OverflowException

What could provoke an OverflowException in a C# program? An OverflowException is only thrown in a checked context.

This exception alerts you to an integer overflow. Overflow is a situation where the number becomes too large to be represented in the bytes.

This program declares a checked programming context inside the Main method. Next, we assign an int variable to one greater than the maximum value that can be stored in an int.

class Program
{
    static void Main()
    {
        checked
        {
            int value = int.MaxValue + int.Parse("1");
        }
    }
}
Unhandled Exception: System.OverflowException:
Arithmetic operation resulted in an overflow.

With the checked context, bugs in our programs that would be silently ignored are changed into serious errors. Control flow is interrupted and programs are terminated.

Summary

The OverflowException helps us learn of logical errors. With the checked context, we detect these hard-to-find bugs. We improve the logic of our code.