gistfile1.cs

public static class Utils{
  public static void Using<T>(T x, Action<T> func) where T: IDisposable
  {
    try {
      func(x);
    }catch(){
      
    }finally{
      x.Dispose();
    }
  }
}

gistfile2.cs

void SomeFunc() {
  utils.Using(new StreamReader(""), x => {
    Console.WriteLine(x.ReadLine());
  };
}