After I downloaded a package called CircularProgressBar via NuGet Packet Manager, I am getting the error has been attached to the post although winFormAnimation.dll is in my references. The program works correctly but I cannot see the form in [Design] section.
In the Installed tab of the NuGet package, it seems that WinFormAnimation is v1.6.0.4. I tried the packages in different solution, it worked. How can I solve the problem and see design section in my main project? Thank you in advance. 