string.Format fails at runtime with array of integers

Question

Consider string.Format() whose parameters are a string and, among others in the overload list, an object[] or many objects.

This statement

Answer 1

Your string.Format is expecting 2 arguments ({0} and {1}). You are only supplying 1 argument (the int[]). You need something more like this:

string bar = string.Format("{0} and {1}", myInts[0], myInts[1]);

The compiler does not notice the problem because the format string is evaluated at runtime. IE The compiler doesn't know that {0} and {1} mean there should be 2 arguments.