dotnet/Documentation/compatibility/uri-unc-shares-normalized.md

Allow Unicode in URIs that resemble UNC shares

Scope

Edge

Version Introduced

4.7.2

Source Analyzer Status

NotPlanned

Change Description

In xref:System.Uri?displayProperty=fullName, constructing a file URI containing both a UNC share name and Unicode characters will no longer result in a URI with invalid internal state. The behavior will change only when all of the following are true:

• The URI has the scheme file: and is followed by four or more slashes.

• The host name begins with an underscore or other non-reserved symbol.

• The URI contains Unicode characters.

• Quirked

• Build-time break

Recommended Action

Applications working with URIs consistently containing Unicode could have conceivably used this behavior to disallow references to UNC shares. Those applications should use xref:System.Uri.IsUnc instead.

Affected APIs

• T:System.Uri

Category

Core