Solve the problem that the class file in VS solution does not display properly at the level

During File Download using SVN in vs2013, after the update is completed for some reason, the functional node files are not properly displayed in the solution list by level, it is displayed at the same level. The cause is traceable, but the solution to this problem is simple.

When a project is created in vs2013, vs automatically generates. CsprojFile. This is a project file of C #, which records information related to the project, such as the file contained, the version of the program, and the type and location of the generated file.

Open the project file and find that the information of the class file that is not normally displayed is missing. Then, save the file according to the file information of the normally displayed class. After the project is reloaded, the class files that are not normally displayed are displayed.