You can add missing using directives by using the Resolve command. You can also clean up the current list of using directives in a file, removing the ones that are no longer needed.
You can remove unneeded using directives by clicking anywhere within a file and selecting Organize Usings | Remove Unused Usings.
In the example below, we start out with 20 using directives at the top of the file.
We then select Remove Unused Usings.
After we execute this command, we’re left with only four using directives at the top of the file.
Filed under: Visual Studio Tagged: C#, using Directive, Visual Studio
