Argument 2 must be passed with the 'ref' keyword code example

Example 1: c# pass arg by reference

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

Example 2: c# ref

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

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