无法安装或运行此应用程序。该应用程序要求首先在“全局程序集缓存（GAC）中安装程序集MySQL版本6.7.4”

1. Problem

无法安装或运行此应用程序。该应用程序要求首先在“全局程序集缓存（GAC）中安装程序集MySQL Data版本6.7.4”

2. Analysis and Solution

Root cause: My solution consists of two projects, one has Mysql Data 6.5.4 reference, the other has Mysql Data 6.7.4 reference.

Solution: Make both project reference Mysql Data 6.5.4, this problem solved.