LoggingInterceptor.cs

public class LoggingInterceptor : IInterceptor
{
  public void Intercept(IInvocation invocation)
  {
    try
    {
      Console.WriteLine("Start");
      invocation.Proceed();
      Console.WriteLine("Success!");
    }
    catch
    {
      Console.WriteLine("Error!");
      throw;
    }
    finally
    {
      Console.WriteLine("Exit");
    }
  }
}