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If you have custom controls: check the code in the constructor.Understand what is the change/edit/modification that triggered the error, and undo it (source control tool can help.).Try to open each single project that compose the solution 1-by-1 and build it, to understand which is the specific project that generate the issue.Clean the solution manually (delete the compiled DLL/EXE in the /bin/ folder and empty the temporary files that VS create during the build process in the /obj/ folder (each project that compose the solution has these folders, so clean them all)).Clean the solution from the IDE (Menu\Build\Clean Solution).
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Here's a list of other things you can try when deleting the. suo file will solve the situation because it reset the open files list, so the solution can start up without opening/showing any files.
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In my experience sometime VS crash on start because there is an error in some source code, and due to that error VS can't compile the code, and then crash because without compiled code it's unable to show form in design mode. suo file, and then retry to start the solution, to see if this help. Just to stay on the safe way, you can rename the. You might have to set the StartUp Project for your solution afterwards. suo file contain various information like the opened files list, and some preferences that are not saved in the solution file (like the starting project) and other things. suo files is a file without name, with just the. suo file in YourSolutionFolder\.vs\YourSolutionName\v15\.suo suo files are located in a different folder: you can find the.
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vs folder for newer versions of Visual Studio. suo file should be in the same folder as your. Have you tried to delete the Your_Solution_FileName.suo file?
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