Question

        var sample = new
        {
            Time = DateTime.Now,
            Name = "Hello"
        };
        Trace.TraceInformation("{0}", sample);

outputs as

ProcessInvocation86.exe Information: 0 : { Time = 04.11.2012 22:07:52,
Name = Hello }

I’d like different formatting in my application. Is there a way to change the implementation of ToString() for anonymous objects in C#? Maybe some static field per AppDomain or something?

Answer 1

No, you can’t do this – ToString, Equals, and GetHashCode have default implementation provided by framework. To override this functionality you should inherit from your anonymous type, which is impossible.

Use String.Format to get desired output.