抛砖引玉：在C#中的对象引用的问题

public class Test

{

private string_Name;

public stringName

{

get{ return _Name; }

set{ _Name = value; }

}

}

public classTestMethod

{

public staticvoid Change(Testt)

{

t.Name = "狗狗";

}

public staticvoid Change(stringstr)

{

str = "狗狗";

}

}

public classTestFunction

{

public voidChange(Test t)

{

t.Name = "猪猪";

}

public voidChange(string str)

{

str = "猪猪";

}

}

static voidMain(string[] args)

{

Testt = new Test();

stringstr = "asd";

t.Name = "wolf";

TestMethod.Change(t);

TestMethod.Change(str);

Write(t.Name);

Write(str);

Testt1 = new Test();

t1 = t;

stringstr1 = str;

newTestFunction().Change(t1);

newTestFunction().Change(str);

Write(str1);

Write(t1.Name);

Console.ReadKey();

}

static voidWrite(string str)

{

Console.WriteLine(str);

}

What will output？

Yeah,the result is

狗狗

asd

asd

猪猪

Why this funny thing happen?