Remove Unused Usings from a Class

We create a Web Form in Visual Studio, a .cs file means code file class is automatically create. That .cs file means class has default usings for namespace.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

 But generally we don't use all namespaces  in that class so we want remove unused namespaces from file. We can remove  namespace manually but it takes time and need full knowledge of class library so we can use Visual Studio .

Step 1:  Right Click in .cs File.

Step 2:  Move on Organize usings.

Step 3: Click on Remove Unused Usings.

After that we have only those namespaces in the file these are using.