将int和char分开并制作整数

Question

大家好我写了一个简单的程序,将参数中的字符串拆分为数字,字母和运算符,但是我遇到了23x + 3 = 8

foreach (char x in args[i]){

    if (char.IsNumber(x)){
        inter[i] = Convert.ToInt32(x);
            Console.WriteLine("{0} is a number ", x);
    }
    else if (char.IsLetter(x)){
        apha[i] = x;
        Console.WriteLine("{0} is a Letter ", x);
    }
    else if (char.IsSymbol(x)){
        symbol[i] = x;
        Console.WriteLine("{0} is a Symbol ", x);
    }

我发现输出是分开的每个char 2和3我想要23作为一个整数.有没有办法将2号码组合在一起？