What does the icon with the white sheet of paper w

问题:

The icon is in the solution explorer next to one of the generated classes

回答1:

That icon indicates that it is a generated file. See the Visual Studio Image Library for details

回答2:

Those are files (especially, resource file .resx) that are automatically generated by the designer, for instance , when you design a form with two ore more language base (localizable : true ), VS automatically generates resources files while you go through ... https://msdn.microsoft.com/en-us/library/y99d1cd3(v=vs.100).aspx