Difference between c# using and Java import

Question

I know that in java that we use *(asterisk) to import all the contents in a package like

import java.lang.*;

Then why don't we use same *(asterisk) in C# to import all the contents is there any method like in java to import all the contents. What is the difference between

import java.awt.*;

and

using System.windows.forms;

Answer 1

What the Java import does what .NET is called a reference - adding a reference to an assembly in .NET allows you to use the (public) types defined in that assembly.

The C# using directive is simply a way to access these types without typing out the whole namespace.

You can also use the directive to provide namespace aliases.