VS2005 strange breakpoint is invalid or member variable value cannot be viewed

There are some cpp Files can set breakpoints and follow them , But there is one cpp Files can never set breakpoints , Tips “ The breakpoint will not be hit at this time . The source code is different from the original version .” , Then I put that cpp Open the document in Notepad , Save as unicode Format , recompile , Finally, the problem is solved ！ You can also change vs2005 Set up , Options -> routine , Just cancel the tick that requires the source file to match the original version exactly ！