Using Visual Studio 2010 C# to compile .NET project for Target Platform x64, the following two warnings appears:
------ Rebuild All started: Project: TestProject-64-bit, Configuration: Debug x64 ------
warning CS1607: Assembly generation -- Referenced assembly 'System.Data.dll' targets a different processor
warning CS1607: Assembly generation -- Referenced assembly 'mscorlib.dll' targets a different processor
Compile complete -- 0 errors, 2 warnings
Manager -> P:\Project Files\TestProject-64-bit\Test-x64.exe
========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========
It is a bug in Visual Studio 2010, and warnings can be safely ignored. There are some bugs already filled in MS Connect. Suggestion is:
Edit the project file directly. Replace the references that are having this problem with explicit paths to the 64 bit ones, eg.,:
<Reference Include="$(Windir)\Microsoft.NET\Framework64\v2.0.50727\system.data.dll" />
Great suggestion, but it won’t work if you need to compile / build both for x86 and x64 platforms. And that is what I need.
MSDN Forum post suggests to disable warning:
Parameters Tab - Advanced - MSBuild Arguments, type /p:NoWarn=1607
It seems, that it is for Team Edition, it does not make sense for me, so I use:
Properties - Build - Suppress warnings: 1607
Currently must live with this hack, if you need to target both 32 and 64-bit platforms. Hope the fix will be released so we can remove warning suppression.