Cs0006 C failed to find metadata file "c:\users\... Problem

1. Refresh

Specific for Redefine the reference relationship –> Regenerate dependencies —> Rebuild the solution .

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When this method doesn't work ---------

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2. Adjust version

Adjustment lead With dll Of .netFreamWork edition and Current project .netFreamWork edition , In the same version .

Specific in , Right-click on the project , attribute , The target framework .