diff --git a/src/MathNet.Numerics.sln b/src/MathNet.Numerics.sln
index d17b1261..42db81f8 100644
--- a/src/MathNet.Numerics.sln
+++ b/src/MathNet.Numerics.sln
@@ -15,8 +15,6 @@ Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharpUnitTests", "FSharpUn
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Silverlight", "Silverlight\Silverlight.csproj", "{793E332F-E2B1-4D1D-9B2E-27E90B99BF93}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IO", "IO\IO.csproj", "{D90B622B-13A4-4E88-BF3A-A82C07D38C93}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -51,10 +49,6 @@ Global
 		{793E332F-E2B1-4D1D-9B2E-27E90B99BF93}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{793E332F-E2B1-4D1D-9B2E-27E90B99BF93}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{793E332F-E2B1-4D1D-9B2E-27E90B99BF93}.Release|Any CPU.Build.0 = Release|Any CPU
-		{D90B622B-13A4-4E88-BF3A-A82C07D38C93}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{D90B622B-13A4-4E88-BF3A-A82C07D38C93}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{D90B622B-13A4-4E88-BF3A-A82C07D38C93}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{D90B622B-13A4-4E88-BF3A-A82C07D38C93}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/src/Numerics/Numerics.csproj b/src/Numerics/Numerics.csproj
index 84eec40a..7c7ac1fc 100644
--- a/src/Numerics/Numerics.csproj
+++ b/src/Numerics/Numerics.csproj
@@ -264,7 +264,9 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <Folder Include="LinearAlgebra\Double\IO\" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/src/Silverlight/Silverlight.csproj b/src/Silverlight/Silverlight.csproj
index 29c77069..e1ddff3b 100644
--- a/src/Silverlight/Silverlight.csproj
+++ b/src/Silverlight/Silverlight.csproj
@@ -408,6 +408,9 @@
       <LastGenOutput>Version.cs</LastGenOutput>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="LinearAlgebra\Double\IO\" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Silverlight\$(SilverlightVersion)\Microsoft.Silverlight.CSharp.targets" />
   <ProjectExtensions>
     <VisualStudio>
diff --git a/src/UnitTests/UnitTests.csproj b/src/UnitTests/UnitTests.csproj
index 7b2e5698..6cf96429 100644
--- a/src/UnitTests/UnitTests.csproj
+++ b/src/UnitTests/UnitTests.csproj
@@ -405,10 +405,6 @@
     </None>
   </ItemGroup>
   <ItemGroup>
-    <ProjectReference Include="..\IO\IO.csproj">
-      <Project>{D90B622B-13A4-4E88-BF3A-A82C07D38C93}</Project>
-      <Name>IO</Name>
-    </ProjectReference>
     <ProjectReference Include="..\Numerics\Numerics.csproj">
       <Project>{B7CAE5F4-A23F-4438-B5BE-41226618B695}</Project>
       <Name>Numerics</Name>