To build and test experimental GTK# visual designer : - checkout and build MonoDevelop trunk - copy entire MonoDevelop.GtkCore2 folder into monodevelop-trunk/main/src/ - create monodevelop-slim folder in the monodevelop-trunk, - copy monodevelop-slim.sln into monodevelop-trunk/monodevelop-slim - open solution in MonoDevelop - build and run Remarks : - monodevelop-trunk is the name of folder where MonoDevelop was checkouted - old stetic designer should be disabled Krzysztof Marecki