Check out example codes for "c# pass arg by reference". It will help you in understanding the concepts better.

Code Example 1

void Method(ref int refArgument)
{
    refArgument = refArgument + 44;
}

int number = 1;
Method(ref number);
Console.WriteLine(number);
// Output: 45

Code Example 2

void Method(ref int refArgument)
{
  // Second param will add to int refArgument
    refArgument = refArgument + 44;
}

int number = 1;
Method(ref number);
Console.WriteLine(number);
// Output: 45

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