Why am I getting these out parameter errors in C#?

Question

I am new to C#. I\'ve tried this with out parameter in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
class Firs         


        

Answer 1

public void Ref_Test(ref int x)
{
    var y = x; // ok
    x = 10;
}

// x is treated as an unitialized variable
public void Out_Test(out int x)
{
    var y = x; // not ok (will not compile)
}

public void Out_Test2(out int x)
{
    x = 10;
    var y = x; // ok because x is initialized in the line above
}