Automatic .ToString()?

Question

I have a method like this: void m1(string str) and have a class like this:

public class MyClass
{
    public bool b1 { set; get; }

    //and ot         


        

Answer 1

The compiler turns "abcdef" + c1 into a string.Concat(object,object) call. This in turn will call .ToString() on each of the arguments and concatenate them. Here's the code from reflector:

public static string Concat(object arg0, object arg1)
{
   if(arg0 == null) arg0 = Empty;
   if(arg1 == null) arg1 = Empty;

   return (arg0.ToString() + arg1.ToString());
}

Note that the last line involves a call to string.Concat(string, string) where the real concatenation happens.