The CompilerMarshalOverride class allows the common language runtime to marshal using the correct sizes.
Some behaviors of the common language runtime are incompatible with some languages. For example, C++ treats Boolean variables as single-byte values, while the common language runtime marshals them as four-byte values to match the BOOLEAN type defined by the Microsoft Win32 API. To work around such issues, the C++ compiler emits this modifier on any wchar_t or bool parameter or function return.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)