C# Client (String array, Bytes, Internal Error, Arguement Error)

For some reason I'm still getting

Error  1       The build stopped unexpectedly because of an internal failure.
Microsoft.Build.Exceptions.BuildAbortedException: Build was canceled. Failed to successfully launch or connect to a child MSBuild.exe process. Verify that the MSBuild.exe "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe" launches successfully, and that it is loading the same microsoft.build.dll that the launching process loaded. If the location seems incorrect, try specifying the correct location in the BuildParameters object, or with the MSBUILD_EXE_PATH environment variable.
   at Microsoft.Build.BackEnd.NodeProviderOutOfProc.CreateNode(Int32 nodeId, INodePacketFactory factory, NodeConfiguration configuration)
   at Microsoft.Build.BackEnd.NodeManager.AttemptCreateNode(INodeProvider nodeProvider, NodeConfiguration nodeConfiguration)
   at Microsoft.Build.BackEnd.NodeManager.CreateNode(NodeConfiguration configuration, NodeAffinity nodeAffinity)
   at Microsoft.Build.Execution.BuildManager.PerformSchedulingActions(IEnumerable`1 responses)
   at Microsoft.Build.Execution.BuildManager.HandleNewRequest(Int32 node, BuildRequestBlocker blocker)
   at Microsoft.Build.Execution.BuildManager.IssueRequestToScheduler(BuildSubmission submission, Boolean allowMainThreadBuild, BuildRequestBlocker blocker)     c:\users\owner\documents\visual studio 2012\Projects\DrawDumpSyringe\DrawDumpSyringe\DrawDumpSyringe.csproj     DrawDumpSyringe

Might have to scrap it and make another

BUT am I allowed to use stream.Write in that way?