c# problem please help me

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace methods
{
class Program
{

static void Main(string[] args)
{
Console.WriteLine("Enter your ferst num");
int x = Convert.ToInt32(Console.ReadLine());

bool Cansul;
char A = '*' ;
char B = '/' ;
char C = '+' ;
char D = '-' ;
Console.WriteLine("but * or / or + or -");
char a =Convert.ToChar( Console.Read());

do
{
if (a == A)
{ Cansul = false; }
else if (a == B)
{ Cansul = false; }
else if (a == C)
{ Cansul = false; }
else if (a == D)
{ Cansul = false; }
else
{
Cansul = true ;
Console.WriteLine("you must but * or / or + or - ");
a =Convert.ToChar( Console.Read());
}
}
while (Cansul);

Console.WriteLine("Enter your second num");
// here the error :( i can't fix it .
int y = Convert.ToInt32(Console.ReadLine());

/*
char A = '*' ;
char B = '/' ;
char C = '+' ;
char D = '-' ;
*/
int Z;
if (a == A)
{ Z = x * y ;
}
else if (a == B)
{ Z = x / y;
}
else if (a == C)
{ Z = x + y;
}
else if (a == D)
{ Z = x - y;
}
else {
Z = 0;
Console.WriteLine("error"); }

Console.WriteLine(value: Z);
Console.WriteLine("any key to End :) ");

Console.Rea

Answer 1

The code seems to be fine.

The only problem I found was.
Console.ReadKey
The ReadKey statement itself works fine but it gives problems in the next line. Which is "Enter your second number".

It looks like Console.ReadKey leaves a carriage-return character for the next input and this next input only gets this carriage-return character instead of the actual input.
int y = Convert.ToInt32(Console.ReadLine()); is fine.

I changed readkey to readline and now it works fine.

The input I used was
1
+
2

https://code.sololearn.com/cVHOr0F2dx0A

Answer 2

Console.WriteLine("but * or / or + or -");
// here is problem with ReadKey ==> Read
char a =Convert.ToChar( Console.ReadKey());

Console.WriteLine("Enter your second num");
//but here i dont know what to do
int y = Convert.ToInt32(Console.ReadLine());