/nowin32manifest (C# Compiler Options)
Use the /nowin32manifest option to instruct the compiler not to embed any application manifest into the executable file.
When this option is used, the application will be subject to virtualization on Windows Vista unless you provide an application manifest in a Win32 Resource file or during a later build step. For more information about virtualization, see .80efa4c7-3904-45c5-82e8-2d558fe67db9
In Visual Studio, set this option in the Application Property page by selecting the Create Application Without a Manifest option in the Manifest drop down list. For more information, see Application Page, Project Designer (C#).
For more information about manifest creation, see /win32manifest (C# Compiler Options).