.net – Do you have any tips to improve ReSharper and/or Visual Studio performance

These files contain user preference configurations that are in general specific to your machine, so it's better not to put it in SCM. Also, VS will change it almost every time you execute it, so it will always be marked by the SCM as 'changed'. I don't include either, I'm in a project using VS for 2 years and had no problems doing that. The only minor annoyance is that the debug parameters (execution path, deployment target, etc.) are stored in one of those files (don't know which), so if you have a standard for them you won't be able to 'publish' it via SCM for other developers to have the entire development environment 'ready to use'.

I've found powershell useful for this. I consider LoC to be a pretty bogus metric anyway, so I don't believe anything more formal should be required.

From a smallish solution's directory:

PS C:\Path> (gci -include *.cs,*.xaml -recurse | select-string .).Count
8396
PS C:\Path>

That will count the non-blank lines in all the solution's .cs and .xaml files. For a larger project, I just used a different extension list:

PS C:\Other> (gci -include *.cs,*.cpp,*.h,*.idl,*.asmx -recurse | select-string .).Count
909402
PS C:\Other>

Why use an entire app when a single command-line will do it? :)