public static void Main()
Console.WriteLine("First Number:");
string firstnum = Console.ReadLine();
double finalfirstnum = Convert.ToDouble(firstnum);
if(error==1) {Console.WriteLine("Error. Please Enter a Valid Operator!");
Console.WriteLine(finalfirstnum);
Console.WriteLine("-------------------------------------");
Console.WriteLine("Enter an Operator:");
Console.WriteLine("Add [1], Subtract [2], Multiply [3], Divide [4]");
int operator1 = Convert.ToInt32(Console.ReadLine());
else if(op2==2) {op = "-";}
else if(op2==3) {op = "*";}
else if(op2==4) {op = "÷";}
Console.WriteLine(finalfirstnum);
Console.WriteLine("-------------------------------------");
Console.WriteLine("Second Number:");
string secondnum = Console.ReadLine();
double finalsecondnum = Convert.ToDouble(secondnum);
finalnum = finalfirstnum + finalsecondnum;
finalnum = finalfirstnum - finalsecondnum;
finalnum = finalfirstnum * finalsecondnum;
finalnum = finalfirstnum / finalsecondnum;
Console.WriteLine("Restart and use a valid operator!");
Console.WriteLine(finalfirstnum);
Console.WriteLine(op + " " + finalsecondnum);
Console.WriteLine("-------------------------------------");
Console.WriteLine(finalnum);
Console.WriteLine("Type anything to clear");