Question

Boxing is when a value type is assigned to an object type. Is it the same when a reference type is assigned to an object?

When a type (which isn’t object) is assigned, what happens? Is that boxing too?

    int num=5;
    object obj = num;  //boxing
    //////////////////////
    MyClass my = new MyClass();
    object obj = my; //what is name this convert  (whethere is boxing?)

Answer 1

I assume you mean something like

string s = "hello";
object x = s;        // no boxing, just implict conversion to base-type.

This works because System.String, like all other classes, derives from System.Object:

public sealed class String : Object { ... }