The type ‘System.IO.Packaging.Package’ is defined in an assembly that is not referenced. You must add a reference to assembly ‘WindowsBase, Version=126.96.36.199, Culture=neutral, PublicKeyToken=31bf3856ad364e35’
just right click , reference in solution of the project and search for the “windowbase” , like the below snagit
then click add.
Thats it, Now build the solution and get rid of the error.
Hope it was useful, kindly share your thoughts or feedbacks
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