Today I decided it was time to set some of my projects to use .Net 4 instead of .Net 3.5 and I felt the pain.
First, I had some trouble with my barcodereader framework which was built for .Net 1.1. No problem, I quickly changed it over with another framework I like better and which is built for .Net 4.0.
Then I committed and I broke the built :-(. The test projects I had converted to .net 4.0. would not build anymore.
System.BadImageFormatException: Could not load file or assembly ‘C:Visual studio projectsTDB2009ProjectsTDB2009.View.Menu.TestCbinDebugTDB2009.View.Menu.TestC.dll’ or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.
And this in the output.
Execution Runtime: net-2.0
That won’t work.
First thing I did was to upgrade NUnit to version 2.5.5 from version 2.5.2.
That didn’t help. Perhaps it did but not at first.
Searching google I found this.
And what helped me was this line.
Modify nunit-console.exe.config with the following:
<startup> <requiredruntime version=“v4.0.30319”></requiredruntime></startup></configuration>
GUI config. And all is well again.