AssemblyDefinition assembly = AssemblyDefinition.ReadAssembly("MyAssembly.dll"); MethodDefinition myMethod = assembly.MainModule.Types .First(t => t.Name == "MyClass") .Methods.First(m => m.Name == "MyMethod");
myMethod.ReturnType = newTypeReference; myMethod.Parameters.RemoveAt(0); myMethod.Parameters.Add(new ParameterDefinition("newParam", parameterType));
MethodDefinition newMethod = new MethodDefinition( "NewMethod", MethodAttributes.Public | MethodAttributes.Static, returnType); newMethod.Parameters.Add(new ParameterDefinition("param1", parameterType)); newMethod.Parameters.Add(new ParameterDefinition("param2", parameterType)); myType.Methods.Add(newMethod);In conclusion, Mono.Cecil is a powerful library that enables C# developers to analyze and manipulate .NET assemblies, and MethodDefinition is a crucial part of this library that enables C# programmers to manipulate methods within an assembly.