Question

Can anyone tell me how I would create a MustOverride property using Reflection?

Answer 1

Do you mean with Reflection.Emit? If so, you use TypeBuilder.DefineMethod, with MethodAttributes.Abstract.

Here’s an example; in Bar.Method is abstract; Bar2.Method overrides it.

    AssemblyName an = new AssemblyName('Foo');     var asm = AppDomain.CurrentDomain.DefineDynamicAssembly(an, AssemblyBuilderAccess.Run);     var module = asm.DefineDynamicModule('Foo');     var type = module.DefineType('Bar', TypeAttributes.Abstract | TypeAttributes.Class | TypeAttributes.AnsiClass);     var method = type.DefineMethod('Method', MethodAttributes.Abstract | MethodAttributes.Public | MethodAttributes.Virtual,         CallingConventions.HasThis, typeof(int), Type.EmptyTypes);      var final = type.CreateType();      type = module.DefineType('Bar2', TypeAttributes.Sealed | TypeAttributes.Class | TypeAttributes.AnsiClass, final);     var method2 = type.DefineMethod('Bar', MethodAttributes.Public | MethodAttributes.Virtual,         CallingConventions.HasThis, typeof(int), Type.EmptyTypes);     var il = method2.GetILGenerator();     il.Emit(OpCodes.Ldc_I4_4);     il.Emit(OpCodes.Ret);     type.DefineMethodOverride(method2, method);      var concrete = type.CreateType();     object obj = Activator.CreateInstance(concrete);     int result = (int) concrete.GetMethod('Bar').Invoke(obj, null);