Example of how to use the throw statement. From Fundamentals of Computer Programming with C# http://www.introprogramming.info/wp-content/uploads/2013/07/Books/CSharpEn/Fundamentals-of-Computer-Programming-with-CSharp-Nakov-eBook-v2013.pdf
static void Main()
{
Exception ex = new Exception("Exception thrown due to an issue with the program.");
throw ex;
}