public ExpressionController()
        {

            MagicExpressions express = new MagicExpressions();
            var factorial = express.MakeFactorialExpression<UInt64>().Compile();
            var val = factorial(10);

        }
 public ExpressionController()
 {
     MagicExpressions express = new MagicExpressions();
     var factorial            = express.MakeFactorialExpression <UInt64>().Compile();
     var val = factorial(10);
 }