Best way to generate code in C# similar to using decorators?

Question

Say I have a pattern that I'm constantly repeating. Something like:

static class C {
  [DllImport("mydll")]
  private static extern uint MyNativeCall1(Action a);
  public static uint MyWrapper1(Action a) {
    // Do something
    return MyNativeCall1(a);
  }

  [DllImport("mydll")]
  private static extern uint MyNativeCall2(Action a);
  public static uint MyWrapper2(Action a) {
    // Do something
    return MyNativeCall2(a);
  }

  //...

  [DllImport("mydll")]
  private static extern uint MyNativeCallN(Action a);
  public static uint MyWrapperN(Action a) {
    // Do something
    return MyNativeCallN(a);
  }
}

The only thing different in all those is the name of the native function and wrapper method. Is there a way to generate them via something like decorators? At first I thought C# attributes were decorators. That is, that I could generate the code via something like [GenerateScaffolding("MyNativeCall1")]. But it seems attributes are more like annotations, instantiating a class that holds some metadata.

Neither does C# have macros. So is there any way to do this?

A few things to keep in mind:

• The idea is that the wrapper methods have extra code; they are not merely calling the native functions.
• The idea is also that the generated code can be interleaved with other existing code inside a class and not to generate the class file itself; something like either decorators or C/C++ macros.
• The approach should not depend on any particular IDE. Specifically, I'm not on Visual Studio.

Answer 1

Taking the idea from this MSDN article on T4 Templates, you could so something like:

<#@ template debug="false" hostspecific="false" language="C#" #>
<#@ output extension=".cs" #>
static class C {
<#  
    int N = 15;
    for(int i=0; i<N; i++)
    { #>
    [DllImport("mydll")]
    private static extern uint MyNativeCall<#= i #>(Action a);
    public static uint MyWrapper<%#= i #>(Action a) {
        return MyNativeCall<#= i #>(a);
    }
<# }  #>
}