. Net core learning notes install EF [Microsoft. EntityFrameworkCore] extension error,

. Net core learning notes install EF [Microsoft. EntityFrameworkCore] extension error,

I recently learned about. NET CORE and encountered problems at the beginning.

If you try to install the EF framework, an error is reported,

The following error is reported:

Failed to restore the error package. Rolling back the "XXX" package changes.

 

After looking for a solution for a long time, I did not find the corresponding problems and solutions on the Internet. However, I saw a flash of information in the output, and I saw the information and read it carefully, the version numbers are inconsistent.

 

 

Solution: 1. the installed Microsoft. EntityFrameworkCore version is the same as that in your project.

2. Upgrade the version number of the related extension in your project, and then Install the Microsoft. EntityFrameworkCore extension.