http://blogs.msdn.com/karstenj/archive/2005/06/28/passing-a-preprocessor-directive-to-msbuild-via-the-command-line-instead-of-define-in-code.aspxI recently wanted to pass a preprocessor directive (as in affecting /define in csc.exe) to MSBUILD on the commandline instead of using #DEFINE/#UNDEF in the source code or modifying the configuration properties in VS. (After all, isn't that the idea ofen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/karstenj/archive/2005/06/28/passing-a-preprocessor-directive-to-msbuild-via-the-command-line-instead-of-define-in-code.aspx#8510906Fri, 16 May 2008 06:54:31 GMT91d46819-8472-40ad-a661-2c78acb4018c:8510906Rob's Blog<p>Conditional Compile based on .net framework version</p>