I don't know why it is currently showing "package not found". I have used this shield on many other projects, this is the first time I see it. Maybe it is because there is no actual version released in the NuGet? It should fix itself if a NuGet version is released.
Found the NuGet and felt it was too hard to find from the GitHub page. Here: https://www.nuget.org/packages/IPAddressControlLib
Shield information found here: https://shields.io/category/version
I don't know why it is currently showing "package not found". I have used this shield on many other projects, this is the first time I see it. Maybe it is because there is no actual version released in the NuGet? It should fix itself if a NuGet version is released.