Explain with example.Why do we need boxing and unboxing in C#?

[gosai jahnvi]

Why do we need boxing and unboxing in C#?explain with example?

I know what is boxing and unboxing , but I can't understend the real use of it. Why and where should I use it?

int n = 24;
object ob = n;//boxing

int m = (int) ob;//unboxing