Fix missing UI usings.

BizHawk.Client.EmuHawk/AboutBox.cs

@@ -192,7 +192,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void btnBizBox_Click(object sender, EventArgs e)
 		{
-			new BizBox().ShowDialog();
+			using var bizBox = new BizBox();
+			bizBox.ShowDialog();
 		}
 	}
 

BizHawk.Client.EmuHawk/CustomControls/TextDebugView.cs

@@ -15,9 +15,8 @@ namespace BizHawk.Client.EmuHawk
 		{
 			base.OnPaint(e);
 			e.Graphics.Clear(SystemColors.Control);
-			Font font = new Font(new FontFamily("Courier New"), 8);
+			using var font = new Font(new FontFamily("Courier New"), 8);
 			e.Graphics.DrawString(Text, font, Brushes.Black,0,0);
-			font.Dispose();
 		}
 
 		public override string Text

BizHawk.Client.EmuHawk/Extensions/ControlExtensions.cs

@@ -131,9 +131,8 @@ namespace BizHawk.Client.EmuHawk.WinFormExtensions
 		public static DialogResult ShowHawkDialog(this CommonDialog form)
 		{
 			GlobalWin.Sound.StopSound();
-			var tempForm = new Form() { TopMost = true };
+			using var tempForm = new Form() { TopMost = true };
 			var result = form.ShowDialog(tempForm);
-			tempForm.Dispose();
 			GlobalWin.Sound.StartSound();
 			return result;
 		}

BizHawk.Client.EmuHawk/LogWindow.cs

@@ -142,7 +142,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void AddToGameDbBtn_Click(object sender, EventArgs e)
 		{
-			var picker = new RomStatusPicker();
+			using var picker = new RomStatusPicker();
 			var result = picker.ShowDialog();
 			if (result == DialogResult.OK)
 			{

BizHawk.Client.EmuHawk/MainForm.Events.cs

@@ -312,7 +312,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void OpenAdvancedMenuItem_Click(object sender, EventArgs e)
 		{
-			var oac = new OpenAdvancedChooser(this);
+			using var oac = new OpenAdvancedChooser(this);
 			if (oac.ShowHawkDialog() == DialogResult.Cancel)
 			{
 				return;
@@ -355,7 +355,7 @@ namespace BizHawk.Client.EmuHawk
 
 			/*************************/
 			/* CLONE OF CODE FROM OpenRom (mostly) */
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = PathManager.GetRomsPath(Emulator.SystemId),
 				Filter = filter,
@@ -489,12 +489,14 @@ namespace BizHawk.Client.EmuHawk
 				// Inaccurate core but allow the user to continue anyway
 			}
 
-			new RecordMovie(Emulator).ShowDialog();
+			using var form = new RecordMovie(Emulator);
+			form.ShowDialog();
 		}
 
 		private void PlayMovieMenuItem_Click(object sender, EventArgs e)
 		{
-			new PlayMovie().ShowDialog();
+			using var form = new PlayMovie();
+			form.ShowDialog();
 		}
 
 		private void StopMovieMenuItem_Click(object sender, EventArgs e)
@@ -509,7 +511,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void ImportMovieMenuItem_Click(object sender, EventArgs e)
 		{
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = PathManager.GetRomsPath(Emulator.SystemId),
 				Multiselect = true,
@@ -646,7 +648,7 @@ namespace BizHawk.Client.EmuHawk
 		{
 			var path = $"{PathManager.ScreenshotPrefix(Global.Game)}.{DateTime.Now:yyyy-MM-dd HH.mm.ss}.png";
 
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				InitialDirectory = Path.GetDirectoryName(path),
 				FileName = Path.GetFileName(path),
@@ -965,7 +967,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void ControllersMenuItem_Click(object sender, EventArgs e)
 		{
-			var controller = new ControllerConfig(Emulator.ControllerDefinition);
+			using var controller = new ControllerConfig(Emulator.ControllerDefinition);
 			if (controller.ShowDialog() == DialogResult.OK)
 			{
 				InitControls();
@@ -975,7 +977,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void HotkeysMenuItem_Click(object sender, EventArgs e)
 		{
-			if (new HotkeyConfig().ShowDialog() == DialogResult.OK)
+			using var hotkeyConfig = new HotkeyConfig();
+			if (hotkeyConfig.ShowDialog() == DialogResult.OK)
 			{
 				InitControls();
 				InputManager.SyncControls();
@@ -986,28 +989,33 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (e is RomLoader.RomErrorArgs args)
 			{
-				var result = new FirmwaresConfig(true, args.RomPath).ShowDialog();
+				using var configForm = new FirmwaresConfig(true, args.RomPath);
+				var result = configForm.ShowDialog();
 				args.Retry = result == DialogResult.Retry;
 			}
 			else
 			{
-				new FirmwaresConfig().ShowDialog();
+				using var configForm = new FirmwaresConfig();
+				configForm.ShowDialog();
 			}
 		}
 
 		private void MessagesMenuItem_Click(object sender, EventArgs e)
 		{
-			new MessageConfig().ShowDialog();
+			using var form = new MessageConfig();
+			form.ShowDialog();
 		}
 
 		private void PathsMenuItem_Click(object sender, EventArgs e)
 		{
-			new PathConfig().ShowDialog();
+			using var form = new PathConfig();
+			form.ShowDialog();
 		}
 
 		private void SoundMenuItem_Click(object sender, EventArgs e)
 		{
-			if (new SoundConfig().ShowDialog() == DialogResult.OK)
+			using var form = new SoundConfig();
+			if (form.ShowDialog() == DialogResult.OK)
 			{
 				RewireSound();
 			}
@@ -1015,27 +1023,32 @@ namespace BizHawk.Client.EmuHawk
 
 		private void AutofireMenuItem_Click(object sender, EventArgs e)
 		{
-			new AutofireConfig().ShowDialog();
+			using var form = new AutofireConfig();
+			form.ShowDialog();
 		}
 
 		private void RewindOptionsMenuItem_Click(object sender, EventArgs e)
 		{
-			new RewindConfig().ShowDialog();
+			using var form = new RewindConfig();
+			form.ShowDialog();
 		}
 
 		private void FileExtensionsMenuItem_Click(object sender, EventArgs e)
 		{
-			new FileExtensionPreferences().ShowDialog();
+			using var form = new FileExtensionPreferences();
+			form.ShowDialog();
 		}
 
 		private void CustomizeMenuItem_Click(object sender, EventArgs e)
 		{
-			new EmuHawkOptions().ShowDialog();
+			using var form = new EmuHawkOptions();
+			form.ShowDialog();
 		}
 
 		private void ProfilesMenuItem_Click(object sender, EventArgs e)
 		{
-			if (new ProfileConfig().ShowDialog() == DialogResult.OK)
+			using var form = new ProfileConfig();
+			if (form.ShowDialog() == DialogResult.OK)
 			{
 				GlobalWin.OSD.AddMessage("Profile settings saved");
 
@@ -1305,7 +1318,7 @@ namespace BizHawk.Client.EmuHawk
 		private void SaveConfigAsMenuItem_Click(object sender, EventArgs e)
 		{
 			var path = PathManager.DefaultIniPath;
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				InitialDirectory = Path.GetDirectoryName(path),
 				FileName = Path.GetFileName(path),
@@ -1331,7 +1344,7 @@ namespace BizHawk.Client.EmuHawk
 		private void LoadConfigFromMenuItem_Click(object sender, EventArgs e)
 		{
 			var path = PathManager.DefaultIniPath;
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = Path.GetDirectoryName(path),
 				FileName = Path.GetFileName(path),
@@ -1507,7 +1520,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void BatchRunnerToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new BatchRun().ShowDialog();
+			using var form = new BatchRun();
+			form.ShowDialog();
 		}
 
 		private void NewHexEditorMenuItem_Click(object sender, EventArgs e)
@@ -1595,15 +1609,18 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (Emulator is NES)
 			{
-				new NESGraphicsConfig().ShowDialog(this);
+				using var form = new NESGraphicsConfig();
+				form.ShowDialog(this);
 			}
 			else if (Emulator is SubNESHawk)
 			{
-				new NESGraphicsConfig().ShowDialog(this);
+				using var form = new NESGraphicsConfig();
+				form.ShowDialog(this);
 			}
 			else if (Emulator is QuickNES)
 			{
-				new QuickNesConfig().ShowDialog(this);
+				using var form = new QuickNesConfig();
+				form.ShowDialog(this);
 			}
 		}
 
@@ -1616,7 +1633,8 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (Emulator is NES nes && nes.IsVS)
 			{
-				new NesVsSettings().ShowHawkDialog();
+				using var form = new NesVsSettings();
+				form.ShowHawkDialog();
 			}
 		}
 
@@ -1669,11 +1687,13 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (Emulator is NES)
 			{
-				new NesControllerSettings().ShowDialog();
+				using var form = new NesControllerSettings();
+				form.ShowDialog();
 			}
 			else if (Emulator is SubNESHawk)
 			{
-				new NesControllerSettings().ShowDialog();
+				using var form = new NesControllerSettings();
+				form.ShowDialog();
 			}
 			else if (Emulator is QuickNES)
 			{
@@ -1719,7 +1739,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void PceGraphicsSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new PCEGraphicsConfig().ShowDialog();
+			using var form = new PCEGraphicsConfig();
+			form.ShowDialog();
 		}
 
 		private void PceBgViewerMenuItem_Click(object sender, EventArgs e)
@@ -1926,7 +1947,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void SMSGraphicsSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new SMSGraphicsConfig().ShowDialog();
+			using var form = new SMSGraphicsConfig();
+			form.ShowDialog();
 		}
 
 		private void GGGameGenieMenuItem_Click(object sender, EventArgs e)
@@ -1996,7 +2018,7 @@ namespace BizHawk.Client.EmuHawk
 		private void LoadTIFileMenuItem_Click(object sender, EventArgs e)
 		{
 			var ti83 = (TI83)Emulator;
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = PathManager.GetRomsPath(Emulator.SystemId),
 				Filter = "TI-83 Program Files (*.83p,*.8xp)|*.83P;*.8xp|All Files|*.*",
@@ -2023,7 +2045,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void TI83PaletteMenuItem_Click(object sender, EventArgs e)
 		{
-			GlobalWin.OSD.AddMessage(new TI83PaletteConfig().ShowDialog() == DialogResult.OK
+			using var form = new TI83PaletteConfig();
+			GlobalWin.OSD.AddMessage(form.ShowDialog() == DialogResult.OK
 				? "Palette settings saved"
 				: "Palette config aborted");
 		}
@@ -2049,12 +2072,14 @@ namespace BizHawk.Client.EmuHawk
 
 		private void A7800ControllerSettingsToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new A7800ControllerSettings().ShowDialog();
+			using var form = new A7800ControllerSettings();
+			form.ShowDialog();
 		}
 
 		private void A7800FilterSettingsToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new A7800FilterSettings().ShowDialog();
+			using var form = new A7800FilterSettings();
+			form.ShowDialog();
 		}
 
 		#endregion
@@ -2141,7 +2166,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void PSXControllerSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new PSXControllerConfigNew().ShowDialog();
+			using var form = new PSXControllerConfigNew();
+			form.ShowDialog();
 		}
 
 		private void PSXOptionsMenuItem_Click(object sender, EventArgs e)
@@ -2160,7 +2186,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void PSXHashDiscsToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new PSXHashDiscs().ShowDialog();
+			using var form = new PSXHashDiscs();
+			form.ShowDialog();
 		}
 
 		#endregion
@@ -2184,7 +2211,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void SNESControllerConfigurationMenuItem_Click(object sender, EventArgs e)
 		{
-			new SNESControllerSettings().ShowDialog();
+			using var form = new SNESControllerSettings();
+			form.ShowDialog();
 		}
 
 		private void SnesGfxDebuggerMenuItem_Click(object sender, EventArgs e)
@@ -2241,7 +2269,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void ColecoControllerSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new ColecoControllerSettings().ShowDialog();
+			using var form = new ColecoControllerSettings();
+			form.ShowDialog();
 		}
 
 		#endregion
@@ -2266,7 +2295,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void N64PluginSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			if (new N64VideoPluginconfig().ShowDialog() == DialogResult.OK)
+			using var form = new N64VideoPluginconfig();
+			if (form.ShowDialog() == DialogResult.OK)
 			{
 				if (Emulator.IsNull())
 				{
@@ -2285,7 +2315,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void N64ControllerSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			if (new N64ControllersSetup().ShowDialog() == DialogResult.OK)
+			using var form = new N64ControllersSetup();
+			if (form.ShowDialog() == DialogResult.OK)
 			{
 				FlagNeedsReboot();
 				GlobalWin.OSD.AddMessage("Controller settings saved but a core reboot is required");
@@ -2502,7 +2533,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void IntVControllerSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new IntvControllerSettings().ShowDialog();
+			using var form = new IntvControllerSettings();
+			form.ShowDialog();
 		}
 
 		#endregion
@@ -2537,27 +2569,32 @@ namespace BizHawk.Client.EmuHawk
 
 		private void ZXSpectrumControllerConfigurationMenuItem_Click(object sender, EventArgs e)
 		{
-			new ZXSpectrumJoystickSettings().ShowDialog();
+			using var form = new ZXSpectrumJoystickSettings();
+			form.ShowDialog();
 		}
 
 		private void ZXSpectrumCoreEmulationSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new ZXSpectrumCoreEmulationSettings().ShowDialog();
+			using var form = new ZXSpectrumCoreEmulationSettings();
+			form.ShowDialog();
 		}
 
 		private void ZXSpectrumNonSyncSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new ZXSpectrumNonSyncSettings().ShowDialog();
+			using var form = new ZXSpectrumNonSyncSettings();
+			form.ShowDialog();
 		}
 
 		private void ZXSpectrumAudioSettingsMenuItem_Click(object sender, EventArgs e)
 		{
-			new ZXSpectrumAudioSettings().ShowDialog();
+			using var form = new ZXSpectrumAudioSettings();
+			form.ShowDialog();
 		}
 
 		private void ZXSpectrumPokeMemoryMenuItem_Click(object sender, EventArgs e)
 		{
-			new ZXSpectrumPokeMemory().ShowDialog();
+			using var form = new ZXSpectrumPokeMemory();
+			form.ShowDialog();
 		}
 
 		private void ZXSpectrumMediaMenuItem_DropDownOpened(object sender, EventArgs e)
@@ -2639,7 +2676,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void ZXSpectrumExportSnapshotMenuItemMenuItem_Click(object sender, EventArgs e)
 		{
-			var zxSnapExpDialog = new SaveFileDialog
+			using var zxSnapExpDialog = new SaveFileDialog
 			{
 				RestoreDirectory = true
 				, Title = "EXPERIMENTAL - Export 3rd party snapshot formats"
@@ -2670,17 +2707,20 @@ namespace BizHawk.Client.EmuHawk
 
 		private void amstradCPCCoreEmulationSettingsToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new AmstradCPCCoreEmulationSettings().ShowDialog();
+			using var form = new AmstradCPCCoreEmulationSettings();
+			form.ShowDialog();
 		}
 
 		private void AmstradCPCAudioSettingsToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new AmstradCPCAudioSettings().ShowDialog();
+			using var form = new AmstradCPCAudioSettings();
+			form.ShowDialog();
 		}
 
 		private void AmstradCPCPokeMemoryToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new AmstradCPCPokeMemory().ShowDialog();
+			using var form = new AmstradCPCPokeMemory();
+			form.ShowDialog();
 		}
 
 		private void AmstradCPCMediaToolStripMenuItem_DropDownOpened(object sender, EventArgs e)
@@ -2762,7 +2802,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void AmstradCPCNonSyncSettingsToolStripMenuItem_Click(object sender, EventArgs e)
 		{
-			new AmstradCPCNonSyncSettings().ShowDialog();
+			using var form = new AmstradCPCNonSyncSettings();
+			form.ShowDialog();
 		}
 
 		#endregion
@@ -2793,11 +2834,13 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (VersionInfo.DeveloperBuild)
 			{
-				new AboutBox().ShowDialog();
+				using var form = new AboutBox();
+				form.ShowDialog();
 			}
 			else
 			{
-				new BizBox().ShowDialog();
+				using var form = new BizBox();
+				form.ShowDialog();
 			}
 		}
 
@@ -2936,7 +2979,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void DisplayConfigMenuItem_Click(object sender, EventArgs e)
 		{
-			var window = new DisplayConfigLite();
+			using var window = new DisplayConfigLite();
 			var result = window.ShowDialog();
 			if (result == DialogResult.OK)
 			{
@@ -2969,7 +3012,7 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (Global.MovieSession.Movie.IsActive)
 			{
-				var form = new EditSubtitlesForm { ReadOnly = Global.MovieSession.ReadOnly };
+				using var form = new EditSubtitlesForm { ReadOnly = Global.MovieSession.ReadOnly };
 				form.GetMovie(Global.MovieSession.Movie);
 				form.ShowDialog();
 			}
@@ -3015,7 +3058,7 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (Global.MovieSession.Movie.IsActive)
 			{
-				var form = new EditCommentsForm();
+				using var form = new EditCommentsForm();
 				form.GetMovie(Global.MovieSession.Movie);
 				form.ShowDialog();
 			}
@@ -3112,7 +3155,7 @@ namespace BizHawk.Client.EmuHawk
 		{
 			// We do not check if the user is actually setting a profile here.
 			// This is intentional.
-			var profileForm = new ProfileConfig();
+			using var profileForm = new ProfileConfig();
 			profileForm.ShowDialog();
 			Global.Config.FirstBoot = false;
 			ProfileFirstBootLabel.Visible = false;

BizHawk.Client.EmuHawk/MainForm.Movie.cs

@@ -30,7 +30,8 @@ namespace BizHawk.Client.EmuHawk
 			}
 			catch (MoviePlatformMismatchException ex)
 			{
-				MessageBox.Show(new Form(){TopMost = true}, ex.Message, "Movie/Platform Mismatch", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				using var ownerForm = new Form() { TopMost = true };
+				MessageBox.Show(ownerForm, ex.Message, "Movie/Platform Mismatch", MessageBoxButtons.OK, MessageBoxIcon.Error);
 				return false;
 			}
 

BizHawk.Client.EmuHawk/MainForm.cs

@@ -1293,7 +1293,7 @@ namespace BizHawk.Client.EmuHawk
 
 		public bool RunLibretroCoreChooser()
 		{
-			var ofd = new OpenFileDialog();
+			using var ofd = new OpenFileDialog();
 
 			if (Global.Config.LibretroCore != null)
 			{
@@ -1625,14 +1625,14 @@ namespace BizHawk.Client.EmuHawk
 					}
 				}
 
-				var writer = new BinaryWriter(new FileStream(newPath, FileMode.Create, FileAccess.Write));
+				using (var writer = new BinaryWriter(new FileStream(newPath, FileMode.Create, FileAccess.Write)))
-				var saveram = Emulator.AsSaveRam().CloneSaveRam();
-
-				if (saveram != null)
 				{
-					writer.Write(saveram, 0, saveram.Length);
+					var saveram = Emulator.AsSaveRam().CloneSaveRam();
+					if (saveram != null)
+					{
+						writer.Write(saveram, 0, saveram.Length);
+					}
 				}
-				writer.Close();
 
 				if (file.Exists)
 				{
@@ -2164,7 +2164,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void OpenRom()
 		{
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = PathManager.GetRomsPath(Emulator.SystemId),
 				Filter = RomFilter,
@@ -3139,7 +3139,7 @@ namespace BizHawk.Client.EmuHawk
 					// handle directories first
 					if (ext == "<directory>")
 					{
-						var fbd = new FolderBrowserEx();
+						using var fbd = new FolderBrowserEx();
 						if (fbd.ShowDialog() == DialogResult.Cancel)
 						{
 							aw.Dispose();
@@ -3150,7 +3150,7 @@ namespace BizHawk.Client.EmuHawk
 					}
 					else
 					{
-						var sfd = new SaveFileDialog();
+						using var sfd = new SaveFileDialog();
 						if (Global.Game != null)
 						{
 							sfd.FileName = $"{PathManager.FilesystemSafeName(Global.Game)}.{ext}"; // don't use Path.ChangeExtension, it might wreck game names with dots in them
@@ -3364,7 +3364,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private int? LoadArchiveChooser(HawkFile file)
 		{
-			var ac = new ArchiveChooser(file);
+			using var ac = new ArchiveChooser(file);
 			if (ac.ShowDialog(this) == DialogResult.OK)
 			{
 				return ac.SelectedMemberIndex;
@@ -3422,7 +3422,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private string ChoosePlatformForRom(RomGame rom)
 		{
-			var platformChooser = new PlatformChooser
+			using var platformChooser = new PlatformChooser
 			{
 				RomGame = rom
 			};
@@ -3569,7 +3569,7 @@ namespace BizHawk.Client.EmuHawk
 						// determine the xml assets and create RomStatusDetails for all of them
 						var xmlGame = XmlGame.Create(new HawkFile(oa_openrom.Path));
 
-						StringWriter xSw = new StringWriter();
+						using var xSw = new StringWriter();
 
 						for (int xg = 0; xg < xmlGame.Assets.Count; xg++)
 						{
@@ -4079,7 +4079,7 @@ namespace BizHawk.Client.EmuHawk
 				file.Directory.Create();
 			}
 
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				AddExtension = true,
 				DefaultExt = "State",
@@ -4113,7 +4113,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = PathManager.GetSaveStatePath(Global.Game),
 				Filter = "Save States (*.State)|*.State|All Files|*.*",

BizHawk.Client.EmuHawk/Program.cs

@@ -47,7 +47,7 @@ namespace BizHawk.Client.EmuHawk
 						$"[{(vc2012.HasValue ? " OK " : "FAIL")}] Visual C++ 2012 Runtime",
 						$"[{(vc2015.HasValue ? " OK " : "FAIL")}] Visual C++ 2015 Runtime"
 					};
-					var box = new CustomControls.PrereqsAlert(reqPresent)
+					using var box = new CustomControls.PrereqsAlert(reqPresent)
 					{
 						textBox1 = { Text = string.Join(Environment.NewLine, alertLines) }
 					};

BizHawk.Client.EmuHawk/config/DisplayConfigLite.cs

@@ -211,7 +211,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void btnSelectUserFilter_Click(object sender, EventArgs e)
 		{
-			var ofd = new OpenFileDialog();
+			using var ofd = new OpenFileDialog();
 			ofd.Filter = ".CGP (*.cgp)|*.cgp";
 			ofd.FileName = PathSelection;
 			if (ofd.ShowDialog() == DialogResult.OK)
@@ -241,7 +241,8 @@ namespace BizHawk.Client.EmuHawk
 					catch {}
 					if (!ok)
 					{
-						new ExceptionBox(errors).ShowDialog();
+						using var errorForm = new ExceptionBox(errors);
+						errorForm.ShowDialog();
 						return;
 					}
 				}

BizHawk.Client.EmuHawk/config/FirmwaresConfig.cs

@@ -569,7 +569,8 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			new PathConfig().ShowDialog(this);
+			using var pathConfig = new PathConfig();
+			pathConfig.ShowDialog(this);
 			RefreshBasePath();
 		}
 

BizHawk.Client.EmuHawk/config/GB/BmpView.cs

@@ -101,7 +101,7 @@ namespace BizHawk.Client.EmuHawk
 				di.Create();
 			}
 
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				FileName = $"{PathManager.FilesystemSafeName(Global.Game)}-Palettes",
 				InitialDirectory = path,

BizHawk.Client.EmuHawk/config/MessageConfig.cs

@@ -302,7 +302,7 @@ namespace BizHawk.Client.EmuHawk
 				y = (int)YNumeric.Maximum - _py;
 			}
 
-			var p = new Pen(_brush);
+			using var p = new Pen(_brush);
 			e.Graphics.DrawLine(p, new Point(x, y), new Point(x + 8, y + 8));
 			e.Graphics.DrawLine(p, new Point(x + 8, y), new Point(x, y + 8));
 			e.Graphics.DrawRectangle(p, new Rectangle(x, y, 8, 8));

BizHawk.Client.EmuHawk/config/NES/NESGraphicsConfig.cs

@@ -59,7 +59,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void BrowsePalette_Click(object sender, EventArgs e)
 		{
-			OpenFileDialog ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 				{
 					InitialDirectory = PathManager.MakeAbsolutePath(Global.Config.PathEntries["NES", "Palettes"].Path, "NES"),
 					Filter = "Palette Files (.pal)|*.PAL|All Files (*.*)|*.*",

BizHawk.Client.EmuHawk/config/NES/QuickNesConfig.cs

@@ -72,7 +72,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void ButtonPal_Click(object sender, EventArgs e)
 		{
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = PathManager.MakeAbsolutePath(Global.Config.PathEntries["NES", "Palettes"].Path, "NES"),
 				Filter = "Palette Files (.pal)|*.PAL|All Files (*.*)|*.*",

BizHawk.Client.EmuHawk/config/PSX/PSXOptions.cs

@@ -73,7 +73,7 @@ namespace BizHawk.Client.EmuHawk
 			var ss = psx.GetSyncSettings();
 			var vid = psx.SystemVidStandard;
 			var size = psx.CurrentVideoSize; 
-			var dlg = new PSXOptions(s, ss, vid, size);
+			using var dlg = new PSXOptions(s, ss, vid, size);
 
 			var result = dlg.ShowDialog(owner);
 			return result;

BizHawk.Client.EmuHawk/config/PathConfig.cs

@@ -173,7 +173,7 @@ namespace BizHawk.Client.EmuHawk
 								return;
 							}
 
-							var f = new FirmwaresConfig { TargetSystem = "Global" };
+							using var f = new FirmwaresConfig { TargetSystem = "Global" };
 							f.ShowDialog(this);
 						};
 
@@ -217,7 +217,7 @@ namespace BizHawk.Client.EmuHawk
 				system = null;
 			}
 
-			var f = new FolderBrowserEx
+			using var f = new FolderBrowserEx
 			{
 				Description = $"Set the directory for {name}",
 				SelectedPath = PathManager.MakeAbsolutePath(box.Text, system)

BizHawk.Client.EmuHawk/config/SNES/SNESOptions.cs

@@ -19,7 +19,7 @@ namespace BizHawk.Client.EmuHawk
 		{
 			var s = ((LibsnesCore)Global.Emulator).GetSettings();
 			var ss = ((LibsnesCore)Global.Emulator).GetSyncSettings();
-			var dlg = new SNESOptions
+			using var dlg = new SNESOptions
 			{
 				AlwaysDoubleSize = s.AlwaysDoubleSize,
 				CropSGBFrame = s.CropSGBFrame,

BizHawk.Client.EmuHawk/config/TI83/TI83PaletteConfig.cs

@@ -49,7 +49,7 @@ namespace BizHawk.Client.EmuHawk
 			// and the rgb order is switched
 			int customColor = BackgroundPanel.BackColor.R | BackgroundPanel.BackColor.G << 8 | BackgroundPanel.BackColor.B << 16;
 
-			var dlg = new ColorDialog
+			using var dlg = new ColorDialog
 			{
 				AllowFullOpen = true,
 				AnyColor = true,
@@ -70,7 +70,7 @@ namespace BizHawk.Client.EmuHawk
 			// and the rgb order is switched
 			int customColor = ForeGroundPanel.BackColor.R | ForeGroundPanel.BackColor.G << 8 | ForeGroundPanel.BackColor.B << 16;
 
-			var dlg = new ColorDialog
+			using var dlg = new ColorDialog
 			{
 				AllowFullOpen = true,
 				AnyColor = true,

BizHawk.Client.EmuHawk/config/ZXSpectrum/ZXSpectrumNonSyncSettings.cs

@@ -103,7 +103,7 @@ namespace BizHawk.Client.EmuHawk
         {
             var currColor = _settings.BackgroundColor;
             System.Drawing.Color c = System.Drawing.Color.FromArgb(currColor);
-            ColorDialog cd = new ColorDialog();
+            using var cd = new ColorDialog();
 
             System.Drawing.Color[] colors = new System.Drawing.Color[]
             {

BizHawk.Client.EmuHawk/movie/EditSubtitlesForm.cs

@@ -176,7 +176,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			var s = new SubtitleMaker {Sub = GetRow(c[0].Index)};
+			using var s = new SubtitleMaker {Sub = GetRow(c[0].Index)};
 			if (s.ShowDialog() == DialogResult.OK)
 			{
 				ChangeRow(s.Sub, SubGrid.SelectedRows[0].Index);
@@ -186,7 +186,7 @@ namespace BizHawk.Client.EmuHawk
 		private void Export_Click(object sender, EventArgs e)
 		{
 			// Get file to save as
-			var form = new SaveFileDialog
+			using var form = new SaveFileDialog
 			{
 				AddExtension = true,
 				Filter = "SubRip Files (*.srt)|*.srt|All files (*.*)|*.*"

BizHawk.Client.EmuHawk/movie/PlayMovie.cs

@@ -557,7 +557,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void BrowseMovies_Click(object sender, EventArgs e)
 		{
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				Filter = $"Movie Files (*.{MovieService.DefaultExtension})|*.{MovieService.DefaultExtension}|TAS project Files (*.{TasMovie.Extension})|*.{TasMovie.Extension}|All Files|*.*",
 				InitialDirectory = PathManager.MakeAbsolutePath(Global.Config.PathEntries.MoviesPathFragment, null)

BizHawk.Client.EmuHawk/movie/RecordMovie.cs

@@ -177,7 +177,7 @@ namespace BizHawk.Client.EmuHawk
 				else throw;
 			}
 			
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				InitialDirectory = movieFolderPath,
 				DefaultExt = $".{Global.MovieSession.Movie.PreferredExtension}",

BizHawk.Client.EmuHawk/tools/CDL.cs

@@ -457,7 +457,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			var sfd = new SaveFileDialog();
+			using var sfd = new SaveFileDialog();
 			var result = sfd.ShowDialog(this);
 			if (result == DialogResult.OK)
 			{
@@ -584,7 +584,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void tsbExportText_Click(object sender, EventArgs e)
 		{
-			StringWriter sw = new StringWriter();
+			using var sw = new StringWriter();
 			foreach(var line in listContents)
 			{
 				foreach (var entry in line)

BizHawk.Client.EmuHawk/tools/HexEditor/HexEditor.cs

@@ -953,7 +953,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private string GetBinarySaveFileFromUser()
 		{
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				Filter = GetSaveFileFilter(),
 				RestoreDirectory = true,
@@ -976,7 +976,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private string GetSaveFileFromUser()
 		{
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				Filter = "Text (*.txt)|*.txt|All Files|*.*",
 				RestoreDirectory = true,
@@ -1348,7 +1348,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			var sfd = new OpenFileDialog
+			using var sfd = new OpenFileDialog
 			{
 				Filter = "Binary (*.bin)|*.bin|Save Files (*.sav)|*.sav|All Files|*.*",
 				RestoreDirectory = true,
@@ -1407,7 +1407,7 @@ namespace BizHawk.Client.EmuHawk
 				romName = Global.Config.RecentRoms.MostRecent;
 			}
 
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				FileName = $"{Path.GetFileNameWithoutExtension(romName)}.tbl",
 				InitialDirectory = intialDirectory,
@@ -1676,7 +1676,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void GoToAddressMenuItem_Click(object sender, EventArgs e)
 		{
-			var inputPrompt = new InputPrompt
+			using var inputPrompt = new InputPrompt
 			{
 				Text = "Go to Address",
 				StartLocation = this.ChildPointToScreen(MemoryViewerBox),
@@ -1759,7 +1759,7 @@ namespace BizHawk.Client.EmuHawk
 
 			if (addresses.Any())
 			{
-				var poke = new RamPoke
+				using var poke = new RamPoke
 				{
 					InitialLocation = this.ChildPointToScreen(AddressLabel),
 					ParentTool = this
@@ -1785,7 +1785,8 @@ namespace BizHawk.Client.EmuHawk
 
 		private void SetColorsMenuItem_Click(object sender, EventArgs e)
 		{
-			new HexColorsForm().ShowHawkDialog();
+			using var form = new HexColorsForm();
+			form.ShowHawkDialog();
 		}
 
 		private void ResetColorsToDefaultMenuItem_Click(object sender, EventArgs e)
@@ -2461,7 +2462,7 @@ namespace BizHawk.Client.EmuHawk
 			//mat.M41 = matVals[3, 0]; mat.M42 = matVals[3, 1]; mat.M43 = matVals[3, 2]; mat.M44 = matVals[3, 3];
 			//MessageBox.Show(mat.ToString());
 
-			StringWriter sw = new StringWriter();
+			using var sw = new StringWriter();
 				for(int i=0;i<4;i++)
 			sw.WriteLine("{0,18:0.00000} {1,18:0.00000} {2,18:0.00000} {3,18:0.00000}", matVals[i, 0], matVals[i, 1], matVals[i, 2], matVals[i, 3]);
 			var str = sw.ToString();

BizHawk.Client.EmuHawk/tools/Macros/MacroInput.cs

@@ -302,7 +302,7 @@ namespace BizHawk.Client.EmuHawk
 
 		public static bool SaveMacroAs(MovieZone macro)
 		{
-			var dialog = new SaveFileDialog
+			using var dialog = new SaveFileDialog
 			{
 				InitialDirectory = SuggestedFolder(),
 				FileName = macro.Name,
@@ -336,7 +336,7 @@ namespace BizHawk.Client.EmuHawk
 
 		public static MovieZone LoadMacro()
 		{
-			var dialog = new OpenFileDialog
+			using var dialog = new OpenFileDialog
 			{
 				InitialDirectory = SuggestedFolder(),
 				Filter = "Movie Macros (*.bk2m)|*.bk2m|All Files|*.*"

BizHawk.Client.EmuHawk/tools/MultiDiskBundler/MultiDiskBundler.cs

@@ -251,7 +251,7 @@ namespace BizHawk.Client.EmuHawk
 				initialDirectory = Path.GetDirectoryName(filename);
 			}
 
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				FileName = filename,
 				InitialDirectory = initialDirectory,

BizHawk.Client.EmuHawk/tools/MultiDiskBundler/MultiDiskFileSelector.cs

@@ -70,63 +70,61 @@ namespace BizHawk.Client.EmuHawk
 
 		private void BrowseButton_Click(object sender, EventArgs e)
 		{
-			using (var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				InitialDirectory = PathManager.MakeAbsolutePath(Global.Config.PathEntries["Global_NULL", "ROM"].Path, "Global_NULL"),
 				Filter = MainForm.RomFilter,
 				RestoreDirectory = true
-			})
+			};
+			string _path = "";
+
+			var result = ofd.ShowHawkDialog();
+			if (result == DialogResult.OK)
 			{
-                string _path = "";
+				_path = ofd.FileName;
+			}
+			else
+			{
+				return;
+			}
 
-				var result = ofd.ShowHawkDialog();
+			try
-				if (result == DialogResult.OK)
+			{
+				var file = new FileInfo(ofd.FileName);
+				var path = BizHawk.Common.HawkFile.Util_ResolveLink(file.FullName);
+
+				using (var hf = new BizHawk.Common.HawkFile(path))
 				{
-					_path = ofd.FileName;
+					if (hf.IsArchive)
+					{
+						// archive - run the archive chooser
+						if (SystemString == "PSX" || SystemString == "PCFX" || SystemString == "SAT")
+						{
+							MessageBox.Show("Using archives with PSX, PCFX or SATURN is not currently recommended/supported.");
+							return;
+						}
+
+						using var ac = new ArchiveChooser(new BizHawk.Common.HawkFile(_path));
+						int memIdx = -1;
+
+						if (ac.ShowDialog(this) == DialogResult.OK)
+						{
+							memIdx = ac.SelectedMemberIndex;
+						}
+
+						var intName = hf.ArchiveItems[memIdx];
+						PathBox.Text = $"{_path}|{intName.Name}";
+					}
+					else
+					{
+						// file is not an archive
+						PathBox.Text = _path;
+					}
 				}
-                else
+			}
-                {
+			catch
-                    return;
+			{
-                }
+				return;
-
-                try
-                {
-                    var file = new FileInfo(ofd.FileName);
-                    var path = BizHawk.Common.HawkFile.Util_ResolveLink(file.FullName);
-
-                    using (var hf = new BizHawk.Common.HawkFile(path))
-                    {
-                        if (hf.IsArchive)
-                        {
-                            // archive - run the archive chooser
-                            if (SystemString == "PSX" || SystemString == "PCFX" || SystemString == "SAT")
-                            {
-                                MessageBox.Show("Using archives with PSX, PCFX or SATURN is not currently recommended/supported.");
-                                return;
-                            }
-
-                            var ac = new ArchiveChooser(new BizHawk.Common.HawkFile(_path));
-                            int memIdx = -1;
-
-                            if (ac.ShowDialog(this) == DialogResult.OK)
-                            {
-                                memIdx = ac.SelectedMemberIndex;
-                            }
-
-                            var intName = hf.ArchiveItems[memIdx];
-                            PathBox.Text = $"{_path}|{intName.Name}";
-                        }
-                        else
-                        {
-                            // file is not an archive
-                            PathBox.Text = _path;
-                        }
-                    }                        
-                }
-                catch
-                {
-                    return;
-                }
 			}
 		}
 

BizHawk.Client.EmuHawk/tools/NES/NESMusicRipper.cs

@@ -109,7 +109,7 @@ namespace BizHawk.Client.EmuHawk
 		private void btnExport_Click(object sender, EventArgs e)
 		{
 			//acquire target
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				Filter = "XRNS (*.xrns)|*.xrns"
 			};

BizHawk.Client.EmuHawk/tools/NES/NameTableViewer.cs

@@ -69,7 +69,7 @@ namespace BizHawk.Client.EmuHawk
 
 		public void Screenshot()
 		{
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 				{
 					FileName = $"{PathManager.FilesystemSafeName(Global.Game)}-Nametables",
 					InitialDirectory = PathManager.MakeAbsolutePath(Global.Config.PathEntries["NES", "Screenshots"].Path, "NES"),

BizHawk.Client.EmuHawk/tools/ToolHelpers.cs

@@ -20,7 +20,7 @@ namespace BizHawk.Client.EmuHawk
 				Directory.CreateDirectory(path);
 			}
 
-			var ofd = new OpenFileDialog
+			using var ofd = new OpenFileDialog
 			{
 				FileName = !string.IsNullOrWhiteSpace(currentFile)
 					? Path.GetFileName(currentFile)
@@ -46,7 +46,7 @@ namespace BizHawk.Client.EmuHawk
 				Directory.CreateDirectory(path);
 			}
 
-			var sfd = new SaveFileDialog
+			using var sfd = new SaveFileDialog
 			{
 				FileName = !string.IsNullOrWhiteSpace(currentFile)
 					? Path.GetFileName(currentFile)

BizHawk.Client.EmuHawk/tools/TraceLogger.cs

@@ -291,7 +291,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private FileInfo GetFileFromUser()
 		{
-			var sfd = new SaveFileDialog();
+			using var sfd = new SaveFileDialog();
 			if (LogFile == null)
 			{
 				sfd.FileName = PathManager.FilesystemSafeName(Global.Game) + _extension;
@@ -367,7 +367,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void MaxLinesMenuItem_Click(object sender, EventArgs e)
 		{
-			var prompt = new InputPrompt
+			using var prompt = new InputPrompt
 			{
 				StartLocation = this.ChildPointToScreen(TraceView),
 				TextInputType = InputPrompt.InputType.Unsigned,
@@ -388,7 +388,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void SegmentSizeMenuItem_Click(object sender, EventArgs e)
 		{
-			var prompt = new InputPrompt
+			using var prompt = new InputPrompt
 			{
 				StartLocation = this.ChildPointToScreen(TraceView),
 				TextInputType = InputPrompt.InputType.Unsigned,