CodePudding user response:

Reference path will not yellow, be able to reference,

CodePudding user response:

Restart VS until he disappeared

CodePudding user response:

Case 1: individual referenced DLL shows yellow exclamation,
Usually because the DLL requires the.net Framework version is not compatible with the current project using version, the version of the DLL needs such as higher than the current project using version, consider modifying project. The.net Framework version to support the DLL,
Reference: http://blog.csdn.net/shiyaru1314/article/details/51331567
Situation 2: open the VS and found all of the DLL project shows a yellow exclamation,
Usually because project packages are changed, or from the SVN/GIT pull down reference due to incomplete, closed VS, remove the project packages folder contents, reopen the VS, to regenerate the project,