Help me Correct it

Question

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

namespace SoloLearn
{
class Program
{
static void Sqr(int x)
{
x = x * x;
Console.Writeline(x);
}
static void Main(string [] args)
{
Sqr(Console.ReadLine(int a[]));

}
}
}

Answer 1

I need help no one know c#?