Placed the Framework into a new project (with corresponding project folder).

OpenTK.sln

@@ -49,8 +49,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "OpenGL", "OpenGL", "{2F3FEA
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenTK.OpenGL", "Source\OpenGL\OpenGL\OpenTK.OpenGL.csproj", "{836876D1-0C8D-4240-BEE4-859D9D3D46CB}"
 	ProjectSection(ProjectDependencies) = postProject
-		{1EDDE592-3923-4898-9006-3D69579E1745} = {1EDDE592-3923-4898-9006-3D69579E1745}
 		{FDFA00B6-FA81-4658-86E1-F312EFB42E1C} = {FDFA00B6-FA81-4658-86E1-F312EFB42E1C}
+		{1EDDE592-3923-4898-9006-3D69579E1745} = {1EDDE592-3923-4898-9006-3D69579E1745}
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenTK.OpenGL.Bind", "Source\OpenGL\Bind\OpenTK.OpenGL.Bind.csproj", "{1EDDE592-3923-4898-9006-3D69579E1745}"
@@ -63,6 +63,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GLSL.Lesson01", "Source\Exa
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenTK.Platform.X", "Source\Platform\X\OpenTK.Platform.X.csproj", "{E3F35BD6-67CE-4AD5-AB98-043CF072A75A}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Framework", "Framework", "{508EF114-8C2A-470D-89FE-5AC15B336B4C}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Framework", "Source\Framework\Framework.csproj", "{26B55626-4EAB-4CAE-82FE-93CD6564D9EA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -89,6 +93,10 @@ Global
 		{E3F35BD6-67CE-4AD5-AB98-043CF072A75A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{E3F35BD6-67CE-4AD5-AB98-043CF072A75A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E3F35BD6-67CE-4AD5-AB98-043CF072A75A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{26B55626-4EAB-4CAE-82FE-93CD6564D9EA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{26B55626-4EAB-4CAE-82FE-93CD6564D9EA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{26B55626-4EAB-4CAE-82FE-93CD6564D9EA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{26B55626-4EAB-4CAE-82FE-93CD6564D9EA}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -101,11 +109,13 @@ Global
 		{84EAC24B-BF87-477C-838D-7110A1A24D41} = {7E640424-E2CD-4DD5-9392-7A706D73930E}
 		{30996477-EDDE-4E45-AB3D-5E466314C755} = {7E640424-E2CD-4DD5-9392-7A706D73930E}
 		{2F3FEAD4-0FBD-48CC-AFA0-29FFF28284C2} = {7E640424-E2CD-4DD5-9392-7A706D73930E}
+		{508EF114-8C2A-470D-89FE-5AC15B336B4C} = {7E640424-E2CD-4DD5-9392-7A706D73930E}
 		{FDFA00B6-FA81-4658-86E1-F312EFB42E1C} = {50DCE788-72FC-47E0-A6BD-50BCCE3FCE5B}
 		{E3F35BD6-67CE-4AD5-AB98-043CF072A75A} = {50DCE788-72FC-47E0-A6BD-50BCCE3FCE5B}
 		{836876D1-0C8D-4240-BEE4-859D9D3D46CB} = {2F3FEAD4-0FBD-48CC-AFA0-29FFF28284C2}
 		{1EDDE592-3923-4898-9006-3D69579E1745} = {2F3FEAD4-0FBD-48CC-AFA0-29FFF28284C2}
 		{70FA6EE8-62C6-437F-AD82-117F2D9CDE68} = {C6E60A87-12B4-444A-BE03-7E980EAC0172}
 		{46980D11-67FA-4B33-903F-BC9D8A4FE60F} = {70FA6EE8-62C6-437F-AD82-117F2D9CDE68}
+		{26B55626-4EAB-4CAE-82FE-93CD6564D9EA} = {508EF114-8C2A-470D-89FE-5AC15B336B4C}
 	EndGlobalSection
 EndGlobal

Source/Examples/OpenGL/GLSL/Lesson01/Cube.cs

@@ -6,6 +6,7 @@ using System.Drawing;
 using System.Text;
 using System.Windows.Forms;
 using System.Threading;
+using OpenTK;
 using OpenTK.OpenGL;
 
 namespace OpenTK.Examples.OpenGL.GLSL

Source/Examples/OpenGL/GLSL/Lesson01/GLSL.Lesson01.csproj

@@ -63,6 +63,10 @@
     </Compile>
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\..\..\..\Framework\Framework.csproj">
+      <Project>{26B55626-4EAB-4CAE-82FE-93CD6564D9EA}</Project>
+      <Name>Framework %28Projects\OpenTK\Framework\Framework%29</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\..\OpenGL\OpenGL\OpenTK.OpenGL.csproj">
       <Project>{836876D1-0C8D-4240-BEE4-859D9D3D46CB}</Project>
       <Name>OpenTK.OpenGL</Name>

Source/Framework/Framework.cs

@@ -1,4 +1,4 @@
-#region License
+#region License
 /* Copyright (c) 2006 Stephen Apostolopoulos
  * See license.txt for license info
  */
@@ -13,8 +13,9 @@ using System.Threading;
 using OpenTK.Platform.Windows;
 using System.Runtime.InteropServices;
 using OpenTK.OpenGL.Platform;
+using OpenTK.OpenGL;
 
-namespace OpenTK.OpenGL
+namespace OpenTK
 {
     public class Framework : Form, IDisposable
     {

Source/Framework/Framework.csproj

@@ -0,0 +1,65 @@
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.50727</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{26B55626-4EAB-4CAE-82FE-93CD6564D9EA}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Framework</RootNamespace>
+    <AssemblyName>Framework</AssemblyName>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</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.Data" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Framework.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\OpenGL\OpenGL\OpenTK.OpenGL.csproj">
+      <Project>{836876D1-0C8D-4240-BEE4-859D9D3D46CB}</Project>
+      <Name>OpenTK.OpenGL</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Platform\Windows\OpenTK.Platform.Windows.csproj">
+      <Project>{FDFA00B6-FA81-4658-86E1-F312EFB42E1C}</Project>
+      <Name>OpenTK.Platform.Windows</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Platform\X\OpenTK.Platform.X.csproj">
+      <Project>{E3F35BD6-67CE-4AD5-AB98-043CF072A75A}</Project>
+      <Name>OpenTK.Platform.X</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\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>

Source/Framework/Properties/AssemblyInfo.cs

@@ -0,0 +1,35 @@
+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("Framework")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Framework")]
+[assembly: AssemblyCopyright("Copyright ©  2006")]
+[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("7652241e-158d-4eb1-85f4-ed40ee356791")]
+
+// 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 Revision and Build Numbers 
+// by using the '*' as shown below:
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Source/OpenGL/OpenGL/OpenTK.OpenGL.csproj

@@ -48,9 +48,6 @@
     <Compile Include="Bindings\WindowsContextLoad.cs" />
     <Compile Include="Bindings\WindowsVistaContextLoad.cs" />
     <Compile Include="Bindings\X11ContextLoad.cs" />
-    <Compile Include="Forms\GLForm.cs">
-      <SubType>Form</SubType>
-    </Compile>
     <Compile Include="Glu.cs" />
     <Compile Include="Contexts\GLContext.cs" />
     <Compile Include="Contexts\WindowsContext.cs" />