System.IO: Allow recursive file system enumeration to continue when directory link's target does not exist

[fitdev]

Perhaps this should be considered holistically as part of .Net 7's improved and more integrated support of file system links into various APIs, but at the least it would be nice to add:

public class EnumerationOptions {

  public bool IgnoreUnresolvableLinkTargets { get; set; } // when false preserves current (DotNet 6) behavior, i.e. throws DirectoryNotFoundException when target cannot be found

}

to prevent throwing of DirectoryNotFoundException when a symlink / junction is encountered during enumeration which has invalid (non-existing) target, as often it is valuable to continue enumeration regardless, plus it will parallel existing IgnoreInaccessible option.

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Issue Details

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Perhaps this should be considered holistically as part of .Net 7's improved and more integrated support of file system links into various APIs, but at the least it would be nice to add:

public class EnumerationOptions {

  public bool IgnoreUnresolvableLinkTargets { get; set; } // when false preserves current (DotNet 6) behavior, i.e. throws DirectoryNotFoundException when target cannot be found

}

to prevent throwing of DirectoryNotFoundException when a symlink / junction is encountered during enumeration which has invalid (non-existing) target, as often it is valuable to continue enumeration regardless, plus it will parallel existing IgnoreInaccessible option.

Author:	fitdev
Assignees:	-
Labels:	area-System.IO, untriaged
Milestone:	-

[iSazonov]

I'd qualify this as a bug and re-use EnumerationOptions.IgnoreInaccessible to mask the exception.

/cc @carlossanlop @jozkee