diff --git a/ExternalProjects/BizHawk.Analyzer/AmbiguousMoneyToFloatConversionAnalyzer.cs b/ExternalProjects/BizHawk.Analyzer/AmbiguousMoneyToFloatConversionAnalyzer.cs
index 085e740570..1418e9cb8c 100644
--- a/ExternalProjects/BizHawk.Analyzer/AmbiguousMoneyToFloatConversionAnalyzer.cs
+++ b/ExternalProjects/BizHawk.Analyzer/AmbiguousMoneyToFloatConversionAnalyzer.cs
@@ -26,27 +26,24 @@ public sealed class AmbiguousMoneyToFloatConversionAnalyzer : DiagnosticAnalyzer
 		context.EnableConcurrentExecution();
 		context.RegisterCompilationStartAction(initContext =>
 		{
-			var decimalSym = initContext.Compilation.GetTypeByMetadataName("System.Decimal")!;
-			var doubleSym = initContext.Compilation.GetTypeByMetadataName("System.Double")!;
-			var floatSym = initContext.Compilation.GetTypeByMetadataName("System.Single")!;
 			initContext.RegisterOperationAction(oac =>
 				{
 					var conversionOp = (IConversionOperation) oac.Operation;
-					var typeOutput = conversionOp.Type;
-					var typeInput = conversionOp.Operand.Type;
+					var typeOutput = conversionOp.Type?.SpecialType ?? SpecialType.None;
+					var typeInput = conversionOp.Operand.Type?.SpecialType ?? SpecialType.None;
 					bool isToDecimal;
 					bool isDoublePrecision;
-					if (decimalSym.Matches(typeOutput))
+					if (typeOutput is SpecialType.System_Decimal)
 					{
-						if (doubleSym.Matches(typeInput)) isDoublePrecision = true;
-						else if (floatSym.Matches(typeInput)) isDoublePrecision = false;
+						if (typeInput is SpecialType.System_Double) isDoublePrecision = true;
+						else if (typeInput is SpecialType.System_Single) isDoublePrecision = false;
 						else return;
 						isToDecimal = true;
 					}
-					else if (decimalSym.Matches(typeInput))
+					else if (typeInput is SpecialType.System_Decimal)
 					{
-						if (doubleSym.Matches(typeOutput)) isDoublePrecision = true;
-						else if (floatSym.Matches(typeOutput)) isDoublePrecision = false;
+						if (typeOutput is SpecialType.System_Double) isDoublePrecision = true;
+						else if (typeOutput is SpecialType.System_Single) isDoublePrecision = false;
 						else return;
 						isToDecimal = false;
 					}
diff --git a/ExternalProjects/BizHawk.Analyzer/TernaryInferredTypeMismatchAnalyzer.cs b/ExternalProjects/BizHawk.Analyzer/TernaryInferredTypeMismatchAnalyzer.cs
index 7aa8011d34..519fe0b23d 100644
--- a/ExternalProjects/BizHawk.Analyzer/TernaryInferredTypeMismatchAnalyzer.cs
+++ b/ExternalProjects/BizHawk.Analyzer/TernaryInferredTypeMismatchAnalyzer.cs
@@ -25,8 +25,6 @@ public sealed class TernaryInferredTypeMismatchAnalyzer : DiagnosticAnalyzer
 		context.EnableConcurrentExecution();
 		context.RegisterCompilationStartAction(initContext =>
 		{
-			var objectSym = initContext.Compilation.GetTypeByMetadataName("System.Object")!;
-			var stringSym = initContext.Compilation.GetTypeByMetadataName("System.String")!;
 			initContext.RegisterOperationAction(oac =>
 				{
 					var ifelseOrTernaryOp = (IConditionalOperation) oac.Operation;
@@ -37,7 +35,7 @@ public sealed class TernaryInferredTypeMismatchAnalyzer : DiagnosticAnalyzer
 					var ternaryOp = ifelseOrTernaryOp;
 					var typeTernary = ternaryOp.Type!;
 #if false // never hit; either both branches are string and there are no conversions, or conversions are necessary
-					if (stringSym.Matches(typeTernary)) return;
+					if (typeTernary.SpecialType is SpecialType.System_String) return;
 #endif
 					var lhs = ternaryOp.WhenTrue;
 					var rhs = ternaryOp.WhenFalse;
@@ -52,17 +50,17 @@ public sealed class TernaryInferredTypeMismatchAnalyzer : DiagnosticAnalyzer
 					var fatal = false;
 					IOperation flaggedOp = ternaryOp;
 					string message;
-					if (stringSym.Matches(typeLHS))
+					if (typeLHS.SpecialType is SpecialType.System_String)
 					{
 						flaggedOp = rhs;
 						message = ERR_MSG_OBJECT;
 					}
-					else if (stringSym.Matches(typeRHS))
+					else if (typeRHS.SpecialType is SpecialType.System_String)
 					{
 						flaggedOp = lhs;
 						message = ERR_MSG_OBJECT;
 					}
-					else if (objectSym.Matches(typeTernary))
+					else if (typeTernary.SpecialType is SpecialType.System_Object)
 					{
 						fatal = true;
 						message = "ternary branches are upcast to object! add ToString calls, or convert one to the other's type";
diff --git a/ExternalProjects/BizHawk.Analyzer/UseSimplerBoolFlipAnalyzer.cs b/ExternalProjects/BizHawk.Analyzer/UseSimplerBoolFlipAnalyzer.cs
index 32b83543eb..45dfe246b0 100644
--- a/ExternalProjects/BizHawk.Analyzer/UseSimplerBoolFlipAnalyzer.cs
+++ b/ExternalProjects/BizHawk.Analyzer/UseSimplerBoolFlipAnalyzer.cs
@@ -28,7 +28,6 @@ public sealed class UseSimplerBoolFlipAnalyzer : DiagnosticAnalyzer
 	{
 		context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.None);
 		context.EnableConcurrentExecution();
-		ISymbol? boolSym = null;
 		context.RegisterOperationAction(
 			oac =>
 			{
@@ -43,8 +42,7 @@ public sealed class UseSimplerBoolFlipAnalyzer : DiagnosticAnalyzer
 				}
 				var operation = (ICompoundAssignmentOperation) oac.Operation;
 				if (operation.OperatorKind is not BinaryOperatorKind.ExclusiveOr) return;
-				boolSym ??= oac.Compilation.GetTypeByMetadataName("System.Boolean")!;
-				if (!boolSym.Matches(operation.Type)) return;
+				if (operation.Type?.SpecialType is not SpecialType.System_Boolean) return;
 				if (operation.Value.Kind is not OperationKind.Literal) return;
 				var lhsOp = operation.Target;
 				bool lhsIsSimpleExpr;
diff --git a/ExternalProjects/BizHawk.Analyzer/UseTypeofOperatorAnalyzer.cs b/ExternalProjects/BizHawk.Analyzer/UseTypeofOperatorAnalyzer.cs
index db59f3bc2f..6212856ec2 100644
--- a/ExternalProjects/BizHawk.Analyzer/UseTypeofOperatorAnalyzer.cs
+++ b/ExternalProjects/BizHawk.Analyzer/UseTypeofOperatorAnalyzer.cs
@@ -39,7 +39,7 @@ public sealed class UseTypeofOperatorAnalyzer : DiagnosticAnalyzer
 			{
 				var operation = (IInvocationOperation) oac.Operation;
 				if (operation.IsImplicit || operation.Instance is null) return;
-				objectDotGetTypeSym ??= oac.Compilation.GetTypeByMetadataName("System.Object")!.GetMembers("GetType")[0];
+				objectDotGetTypeSym ??= oac.Compilation.GetSpecialType(SpecialType.System_Object).GetMembers("GetType")[0];
 				if (!objectDotGetTypeSym.Matches(operation.TargetMethod)) return;
 				if (operation.Instance.Syntax is not ThisExpressionSyntax and not IdentifierNameSyntax { Identifier.Text: "GetType" }) return; // called on something that isn't `this`
 				var enclosingType = operation.SemanticModel!.GetDeclaredSymbol(
diff --git a/References/BizHawk.Analyzer.dll b/References/BizHawk.Analyzer.dll
index 2b383fabf2..b18ae032f2 100644
Binary files a/References/BizHawk.Analyzer.dll and b/References/BizHawk.Analyzer.dll differ