always returns an error when compiling a pre-existing program code using VS2015. strange In some added to the end of the class file some    , prompt Unexpected character, ‘application error.
A compilation error as shown in the title was caused by a special full-corner character in C# code. > special full-corner characters are not displayed and saved in UTF-8 format, and the compiler cannot correctly recognize such characters, resulting in compilation errors.
set the file open mode of VS 2015, make it contains a file with the Angle of all special characters use utf-8 format to open.
1) In Solution Explorer, select the file that needs special opening. 2) Right-click the mouse button to pop up the menu, select “Open Mode”, and use “Charp Editor with Encoding” to open.
Reproduced in: https://blog.51cto.com/studybao/2048899