C # -- Value Type and reference type

Please advise me about the incorrect description ~ Just learned C #

 

The value type can be directly copied as A = B.

The result of referencing type A = B is that a only saves the address of Data B. At this time, a and B point to the same data and the name is different.

String is also a reference type, but the string content is changed. NET will allocate a new memory space for it to store the new string content, instead of rewriting it on the old address.

So

 

Code
String A =   " I'm coffee " ;< P>

string B;

B = A;

console. writeline (a);

B = " Hello " ;

console. writeline (a);

the output result is:

I'm coffee

B = "hello ",. net applied for a piece of memory to store the hello string, and then returned an address to B, so changes to B do not affect a