I have created a new solution with a Microsoft Office Excel 2010 Workbook project (C#). The project works fine and I am able to build run and debug the assembly without any issues. After I have saved and closed the solution, the project will no longer load properly when trying to reopen the solution.
The error claims that the project is unsupported:
This version of Visual Studio does not have the following project types installed or does not support them. You can still open these projects in the version of Visual Studio in which they were originally created.
- ExcelWorkbook1, "C:\Bug\ExcelWorkbookProject1\ExcelWorkbook1.csproj"
No changes required
These projects can be opened in this version of Visual Studio without changing them. They will continue to open in Visual Studio 2010 SP1 and in this version of Visual Studio.
- ExcelWorkbook1, "C:\Bug\ExcelWorkbook1.sln"
Further, in the upgrade report, it states that I do not have the correct version of Office installed, which is inaccurate because the project was created just a few minutes prior on the same machine, with no changes.