Visual Studio- Remove unused namespaces

Step 1: Right click anywhere in Program
Step2 : Hover the Organize Usings
              1. Remove unused Using => It's removed unused namespaces
              2. Sort Using => It's sorted namespaces by alphabetical
              3. Remove and Sort => It's removed unused namespaces and sorted by alphabetical.

Keyboard Shortcut key: SHIFT+F10+O+R

Note 1: Will performance be an issue, if there are unused Using?
                  No, there won't be any impact on the application performance.

Benefits of removing unused namespaces
* Clear code, which in turn makes in easy to read and maintain
* Intellisense runs faster
* Faster Compilation


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