I\'m opening some old VB.NET projects in Visual Studio 2015 and when I edit the code, VS changes the syntax:
It removes \"_\" in concatenations:
\'Be
I had the same problem, and I was able to fix it by disabling the "Pretty listing" option in the editor. You can find this option here:
Tools > Options > Text Editor > Basic > Advanced > Editor Help > Pretty listing (reformatting) of code
I'm not sure what other auto-reformatting this option disables, but at least the editor stopped removing the line continuation characters in old code/projects.
PS: While the Roslyn team says they fixed this (see links below), this bug is still present in the latest version of Visual Studio 2015.
edit Link to bug report - Link to merged fix (copied from first comment on original question)