/// <summary>
/// Performs '+' operation on numerics of type int, long, short, float, double, decimal
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="operand1"></param>
/// <param name="operand2"></param>
/// <exception cref="System.TypeAccessException">Thrown when either or both of the operand types are not numeric.</exception>
/// <returns></returns>
public static T Add <T>(this T operand1, T operand2)
{
var type = typeof(T).Name;
if (!ParallelEnumerable.Contains <string>((new string[] { "Int16", "Int32", "Int64", "Decimal", "Double", "Single" }).AsParallel(), type))
{
throw new TypeAccessException(string.Format("Cannot perform this operation with operands of type '{0}'.", type));
}
dynamic op1 = operand1;
dynamic op2 = operand2;
return((T)(op1 + op2));
}