How is null + true a string?

Question

Since true is not a string type, how is null + true a string ?

string s = true;  //Cannot implicitly convert type \'bool\' to \'string\         


        

Answer 1

var b = (null + DateTime.Now); // String
var b = (null + 1);            // System.Nullable | same with System.Single, System.Double, System.Decimal, System.TimeSpan etc
var b = (null + new Object()); // String | same with any ref type

Crazy?? No, there must be a reason behind it.

Someone call Eric Lippert...