Question

How can I modify an application from Console Application Type to Windows Application Type and vice versa with Mono.Cecil?

Answer 1

To convert a console .exe to windows .exe, you can use:

var file = "foo.exe";
var module = ModuleDefinition.ReadModule (file);
// module.Kind was previously ModuleKind.Console
module.Kind = ModuleKind.Windows;
module.Write (file);

The other way around is as simple as choosing the appropriate ModuleKind value. From Cecil’s source:

public enum ModuleKind {
    Dll,
    Console,
    Windows,
    NetModule,
}