.assembly extern mscorlib {}
.assembly test {}
.module test.exe
.imagebase 0x00400000
.file alignment 0x00000200
.subsystem 0x0003
.corflags 0x00000001

.class public auto ansi beforefieldinit Base
       extends [mscorlib]System.Object
{
  .method public hidebysig newslot virtual 
          instance string  toString() cil managed
  {
    .override [mscorlib]System.Object::ToString
    .maxstack  1
    ldstr      "I'm Base"
    ret
  }

  .method public hidebysig specialname rtspecialname 
          instance void  .ctor() cil managed
  {
    .maxstack  1
    ldarg.0
    call       instance void [mscorlib]System.Object::.ctor()
    ret
  }
}

.class public auto ansi beforefieldinit Derived
       extends Base
{
  .method public hidebysig static void  Main(string[] args) cil managed
  {
    .entrypoint
    .maxstack  1
    newobj     instance void Derived::.ctor()
    call       void [mscorlib]System.Console::WriteLine(object)
    ret
  }

  .method public hidebysig virtual instance string 
          toString() cil managed
  {
    .maxstack  1
    ldstr      "I'm Derived"
    ret
  }

  .method public hidebysig specialname rtspecialname 
          instance void  .ctor() cil managed
  {
    .maxstack  1
    ldarg.0
    call       instance void Base::.ctor()
    ret
  }
}