I have been learning C# thru Deitel's C# book. They have an example that they don't clearly explain the reason for the result.

In a contructor for a class they have:

writeline("Circle 5 constructor: {0}", this );


They explain that "this" implicitly calls the ToString() method of the class. How does the class know that ToString() is the method to call. There are 3 methods in the class. In looking at it, only one class returns a string. Could that be the reason?

Thanks,

Perry