These days have just downloaded NUNIT, because I use .Net SDK, I need to do some work.
1. Copy some of the DLL in the / bin / directory in the NUnit installation directory to Winnt / Microsoft .NET / Framework / V1.1.4322 directory.
2. Modify the CSC.RSP file in the winant / microsoft.net / framework / v1.1.4322 directory, add it in the end of the text
/R :nunit.framework.dll
This can be used smoothly.