static void Main(string[] args)
{
Console.WriteLine("Simple Add:");
foreach (MSIL.Instruction instruction in MSIL.ReadMethod(typeof(Program).GetMethod("simpleAdd")))
{
Console.WriteLine(instruction.ToString());
}
}
static void Main(string[] args)
{
System.Reflection.Emit.AssemblyBuilder assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(new System.Reflection.AssemblyName("Patch"), System.Reflection.Emit.AssemblyBuilderAccess.Run, (string)null);
System.Reflection.Emit.ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("module");
System.Reflection.Emit.TypeBuilder typeBuilder = moduleBuilder.DefineType("program", System.Reflection.TypeAttributes.Public);
System.Reflection.Emit.MethodBuilder methodBuilder = typeBuilder.DefineMethod("simpleSub", System.Reflection.MethodAttributes.Static | System.Reflection.MethodAttributes.Public | System.Reflection.MethodAttributes.HideBySig, typeof(int), new Type[] { typeof(int), typeof(int) });
List <MSIL.Instruction> patchedMethod = new List <MSIL.Instruction>();
foreach (MSIL.Instruction instruction in MSIL.ReadMethod(typeof(Program).GetMethod("simpleAdd")))
{
if (instruction.OpCode == System.Reflection.Emit.OpCodes.Add)
{
instruction.OpCode = System.Reflection.Emit.OpCodes.Sub;
}
patchedMethod.Add(instruction);
}
MSIL.EmitMethod(patchedMethod, methodBuilder);
Type type = typeBuilder.CreateType();
System.Reflection.MethodInfo pathedMethod = type.GetMethod("simpleSub");
System.Console.WriteLine("result: " + (int)pathedMethod.Invoke(null, new object[] { 3, 1 }));
}