'GZipStream' could not be found - reference issue

问题

I can't get to use GZipStream class in my C# ASP.NET 4.5 application.

I get the error:

The type or namespace name 'GZipStream' could not be found (are you missing a using directive or an assembly reference?)

I tried using using System.IO; but the System.IO.Compression is not available in the "Reference Manager" in visual studio. I right click on the object name to see if Visual Studio finds the relevant reference but it does not.

Any suggestions?

回答1:

Need to add reference to System.dll assembly and using System.IO.Compression namespace.

MSDN: GZipStream Class

回答2:

The namespace is not the same as the dll name,You need to add a dll reference to the assembly, System.IO.Compression.FileSystem.dll

来源：https://stackoverflow.com/questions/21042535/gzipstream-could-not-be-found-reference-issue