diff --git a/BizHawk.Common/BizHawk.Common.csproj b/BizHawk.Common/BizHawk.Common.csproj
new file mode 100644
index 0000000000..e0f74a6bca
--- /dev/null
+++ b/BizHawk.Common/BizHawk.Common.csproj
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>BizHawk.Common</RootNamespace>
+    <AssemblyName>BizHawk.Common</AssemblyName>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MruStack.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="UndoHistory.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>
\ No newline at end of file
diff --git a/BizHawk.MultiClient/MruStack.cs b/BizHawk.Common/MruStack.cs
similarity index 89%
rename from BizHawk.MultiClient/MruStack.cs
rename to BizHawk.Common/MruStack.cs
index 9b7713998f..72f915dea0 100644
--- a/BizHawk.MultiClient/MruStack.cs
+++ b/BizHawk.Common/MruStack.cs
@@ -1,4 +1,4 @@
-namespace BizHawk.MultiClient
+namespace BizHawk.Common
 {
 	public class MruStack<T>
 	{
diff --git a/BizHawk.Common/Properties/AssemblyInfo.cs b/BizHawk.Common/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000000..706c13aeb7
--- /dev/null
+++ b/BizHawk.Common/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("BizHawk.Common")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Measurement Incorporated")]
+[assembly: AssemblyProduct("BizHawk.Common")]
+[assembly: AssemblyCopyright("Copyright © Measurement Incorporated 2013")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("f8e9ad29-89d8-478b-a699-ed3369703b6a")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/BizHawk.MultiClient/tools/Watch/UndoHistory.cs b/BizHawk.Common/UndoHistory.cs
similarity index 91%
rename from BizHawk.MultiClient/tools/Watch/UndoHistory.cs
rename to BizHawk.Common/UndoHistory.cs
index 23b41a8b64..b96552c03f 100644
--- a/BizHawk.MultiClient/tools/Watch/UndoHistory.cs
+++ b/BizHawk.Common/UndoHistory.cs
@@ -1,7 +1,7 @@
 using System.Collections.Generic;
 using System.Linq;
 
-namespace BizHawk.Client.Common
+namespace BizHawk.Common
 {
 	public class UndoHistory<T>
 	{
diff --git a/BizHawk.Emulation/BizHawk.Emulation.csproj b/BizHawk.Emulation/BizHawk.Emulation.csproj
index aa88aed485..7d5ded55be 100644
--- a/BizHawk.Emulation/BizHawk.Emulation.csproj
+++ b/BizHawk.Emulation/BizHawk.Emulation.csproj
@@ -583,7 +583,12 @@
   <ItemGroup>
     <Folder Include="Computers\Commodore64\Peripheral\" />
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <ProjectReference Include="..\BizHawk.Common\BizHawk.Common.csproj">
+      <Project>{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}</Project>
+      <Name>BizHawk.Common</Name>
+    </ProjectReference>
+  </ItemGroup>
   <ItemGroup>
     <None Include="Consoles\Atari\docs\stella.pdf" />
     <None Include="Consoles\Coleco\docs\colecovision tech1.pdf" />
diff --git a/BizHawk.MultiClient/BizHawk.MultiClient.csproj b/BizHawk.MultiClient/BizHawk.MultiClient.csproj
index a07f8e57a8..7b6774431f 100644
--- a/BizHawk.MultiClient/BizHawk.MultiClient.csproj
+++ b/BizHawk.MultiClient/BizHawk.MultiClient.csproj
@@ -344,7 +344,6 @@
     <Compile Include="movie\SubtitleMaker.Designer.cs">
       <DependentUpon>SubtitleMaker.cs</DependentUpon>
     </Compile>
-    <Compile Include="MruStack.cs" />
     <Compile Include="NameStateForm.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -734,7 +733,6 @@
     <Compile Include="tools\Watch\RamWatch.Designer.cs">
       <DependentUpon>RamWatch.cs</DependentUpon>
     </Compile>
-    <Compile Include="tools\Watch\UndoHistory.cs" />
     <Compile Include="tools\Watch\WatchEditor.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -1009,6 +1007,10 @@
       <Project>{24A0AA3C-B25F-4197-B23D-476D6462DBA0}</Project>
       <Name>BizHawk.Client.Common</Name>
     </ProjectReference>
+    <ProjectReference Include="..\BizHawk.Common\BizHawk.Common.csproj">
+      <Project>{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}</Project>
+      <Name>BizHawk.Common</Name>
+    </ProjectReference>
     <ProjectReference Include="..\BizHawk.Emulation\BizHawk.Emulation.csproj">
       <Project>{197D4314-8A9F-49BA-977D-54ACEFAEB6BA}</Project>
       <Name>BizHawk.Emulation</Name>
diff --git a/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs b/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs
index 2a7deec794..436a7e9c7a 100644
--- a/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs
+++ b/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs
@@ -6,6 +6,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
+using BizHawk.Common;
 using BizHawk.Client.Common;
 
 namespace BizHawk.MultiClient
diff --git a/BizHawk.sln b/BizHawk.sln
index 0355e2d56d..1f1fe47c80 100644
--- a/BizHawk.sln
+++ b/BizHawk.sln
@@ -11,6 +11,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BizHawk.PCE_Debugger", "Biz
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BizHawk.Client.Common", "BizHawk.Client.Common\BizHawk.Client.Common.csproj", "{24A0AA3C-B25F-4197-B23D-476D6462DBA0}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BizHawk.Common", "BizHawk.Common\BizHawk.Common.csproj", "{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -89,6 +91,18 @@ Global
 		{24A0AA3C-B25F-4197-B23D-476D6462DBA0}.Release|Mixed Platforms.Build.0 = Release|Any CPU
 		{24A0AA3C-B25F-4197-B23D-476D6462DBA0}.Release|Win32.ActiveCfg = Release|Any CPU
 		{24A0AA3C-B25F-4197-B23D-476D6462DBA0}.Release|x86.ActiveCfg = Release|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Debug|Win32.ActiveCfg = Debug|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Release|Win32.ActiveCfg = Release|Any CPU
+		{866F8D13-0678-4FF9-80A4-A3993FD4D8A3}.Release|x86.ActiveCfg = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE