Total Commander

After changing default program for .sln files from VS to Rider icon changed not to Rider icon, but default exe icon instead. Digging registry I noticed that value for default icon for Rider starts with space:
Removing space fixed icon. And bringing space back breaks icon again.

Confirmed! (tested with .png files)

Also TC may be modified to ignore leading spaces in absolute paths, the better way would be to report the wrong registry value to Jetbrains:
https://rider-support.jetbrains.com/hc/en-us/requests/new?ticket_form_id=97145

Regards
Holger

As HolgerK said report the problem to the originator of the problem.
It doesn't make sense to modify TC for such an error which is in no way a common or serious problem.

Well, it's not a problem for Windows Explorer. It handles any number of leading and trailing white spaces. So it's rather confusing to see TC and Explorer behaves differently in the same situation. Also it seems like a common practice to ignore spaces in file and folder names for MS:

https://support.microsoft.com/en-us/help/2829981/support-for-whitespace-characters-in-file-and-folder-names-for-windows

Yes, one may create files or folders with leading white spaces also this is a very bad practice because some programs will fail to address these file as relative path if they trim the spaces away by default.
BUT: you can't create a drive letter starting with space.
This    is    not    a    valid    absolute    path!

Regards
Holger

Yes, actually path with space(s) before device name is not fully qualified path. And pretty much anything will fail trying to address file using such path. It seems that Windows Explorer just trimming registry value.