File.ExistsAsync and File.OpenAsync

[TonyValenti]

I have a ton of files whose existence I need to check. If they are on a really slow network share or on an SMB location that I don't have permission to access, it can take ~10-15 seconds to fail out.

Is there an OpenAsync or ExistsAsync somewhere that I can call that I can cancel with either a token or a timeout?

[stephentoub]

There isn't. The OSes don't provide async versions of these operations.

[huoyaoyuan]

See also #67587 #63153

[TonyValenti]

Tell the OS folks to hop to it!

I can't tell you how many apps I've seen that are plagued by this. Even Windows Explorer and especially the Start menu bug out pretty bad when there is a slow/inaccessible network path.