i had sitecore version 9.0.2 installation successfully running for about a week on development machine and all of a sudden, i did see this error
Could not load file or assembly 'Microsoft.Extensions.DependencyInjection, Version=184.108.40.206, Culture=neutral, PublicKeyToken=adb9793829ddae60' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
I tried few articles and follow some instructions regarding web.config validation and some assembly validations, but the error still persist.
1) Is there any way, we can resolve this error?
2) Any way, we can reset the environment?
3) Can i install another instance on same development machine with same or different version of Sitecore?
Please let me know.