/// <summary>
/// Throws a System.ArgumentNullException with the specified message. The parameter name for
/// the exception will be the value of ensureArg.ArgumentName.
/// </summary>
/// <typeparam name="T">The type parameter of the IEnsureArg instance.</typeparam>
/// <param name="ensureArg">The IEnsureArg instance to throw an exception for.</param>
/// <param name="exceptionMessage">
/// The message to use in the exception. If no exception message is supplied then
/// ensureArg.ExceptionMessage will be used.
/// </param>
public static void ThrowArgumentNullException <T>(this IEnsureArg <T> ensureArg, string exceptionMessage)
{
throw new ArgumentNullException(ensureArg.ArgumentName, ensureArg.FormatArgumentNullExceptionMessage(exceptionMessage));
}
