With this change, if the root certificate is disabled, the certificate chain validation fails. Similarly server certificates that are for the authenticating a server must be configured for server authentication. With this improvement, client certificates that are used to authenticate to a server must be configured for client authentication. NET Framework 4.7.2 improves chain trust certificate validation when using certificate authentication with transport security with WCF. Runtime Improved WCF chain trust certificate validation for Net.Tcp certificate authentication Details Users depending on this behavior to disallow relative URIs should instead specify UriKind.Absolute when creating a URI. The URI must contain percent-encoded Unicode or unreserved symbols.

The URI must be specified as relative by prepending it with 'http:' and not following it with '//'.To reproduce the NullReferenceException, the following items must be true: The simplest reproduction of the NullReferenceException is below, with the two statements being equivalent: bool success = Uri.Tr圜reate('http:%C3%A8', UriKind.RelativeOrAbsolute, out Uri href) īool success = Uri.Tr圜reate('http:è', UriKind.RelativeOrAbsolute, out Uri href) Uri will no longer throw a NullReferenceException when calling Tr圜reate on certain relative URIs containing Unicode. Support special relative URI notation when Unicode is present Details Those applications should use IsUnc instead. The host name begins with an underscore or other non-reserved symbol.Īpplications working with URIs consistently containing Unicode could have conceivably used this behavior to disallow references to UNC shares.The URI has the scheme file: and is followed by four or more slashes.The behavior will change only when all of the following are true: In System.Uri, constructing a file URI containing both a UNC share name and Unicode characters will no longer result in a URI with invalid internal state. NET Framework 4.6.2 to 4.7.2, review the following topics for application compatibility issues that may affect your app: Core Allow Unicode in URIs that resemble UNC shares Details

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