using System;
public class Test
{
public static void Main()
{
String str1 = "Hello";
Console.WriteLine(str1);
tell(str1);
Console.WriteLine(str1);
tellByRef(ref str1);
Console.WriteLine(str1);
}
public static void tell(String str2) {
str2 = "kdok123";
}
public static void tellByRef(ref String str3) {
str3 = "kdok123";
}
}
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