difference between genric and nongeneric?

Unity Engine
1

Hi, I’m new to this, and was just wondering what the difference between

using System.Collections.Generic;

and

using System.Collections;

in the MonoDevelop window is?

When should you add the word Generic?

Thanks,

Chris

2

System.Collections.Generic namespace contains generic types of collection that garantees types of items.
For example:

Generic collection List:
List - could contains only integer values
But, non-generic collection ArrayList could contains items of any type - int, string ant so on.

You could type System.Collections. in IDE and will see the types of this namespace: