We've adopted a convention that when calling a C# function with a "non-obvious" parameter, we use a named parameter even when it's not necessary.
E.g.
obj.Process(save: true)
rather than
obj.Process(true)
While it's unnecessary, it makes it a lot easier when glancing through the code to see what's going on, particularly with booleans or magic numbers.
However, resharper's code cleanup has a habit of removing these. I haven't been able to find a way to tell it to keep named parameters - is there one?
Although you can achieve it by doing what @EricWalker said, I want to propose another option.
You can start up the ReSharper options, look for Inspection Severity then go to Redundant explicit argument name specification and change this to do not show. This way you won't lose all the other good cleanups (like removing full name qualifiers) that remove redundant code offers.
In ReSharper 2018.1
There are two relevant steps. You will likely want to do both, but it depends on how you want ReSharper configured.
First, in Resharper -> Options -> Code Inspection -> Inspection Severity, disable the "Use preferred argument style for literal values" code style. (For bools, "[..] for literal values" is the relevant setting, though I chose to disable all of them.)
This setting is also linked to the ReSharper -> Options -> Code Editing -> Code Style -> Arguments settings, so these should now be automatically changed to "Do not show" instead of "Hint":
Second, the default ReSharper Code Cleanup profile cannot be used due to the "Apply arguments style (named vs. positional)" - this option must be disabled in your code cleanup profile.
The setting you're looking for is under Code Cleanup\C#\Remove code redundancies
I know that's probably not the answer you were hoping for, but you can stop it removing your parameter names by unchecking that setting (along with leaving behind every other redundancy.)
You might be able to setup different profiles in Code Cleanup to work around the issue, but you'd have better luck asking JetBrains folks for solutions.
HTH,
Eric