Use of REF keyword in a method? C#

Question

is the ref keyword used only to return values of void methods, wich aren't supposed to return any value?! or is my statement wrong?

Answer 1

ref keyword is used when we want to affect passed variable to a method.
static void Change(ref int x)
{
x = 2;
}
static void Main(string[] args)
{
int a = 3;
Change(ref a);

Console.WriteLine(a); //outputs 2
}
There is nothing to do with method return type - it can be int, bool... - it doesn't matter.

Answer 2

Ref is used to pass in a reference to an object. This means it will edit that object directly. For instance, if you pass in an integer and perform some calculations that change the value of the integer, the integer’s value will be changed to the new value in the function that called it. If you know c++ or c, it’s like the references or pointers in those languages.

Answer 3

got it, thanks guys!