Document .GetLeftPart doesn't do encoding for already encoded unicode characters

[erdembayar]

Hi,
Previously I filed #11253. Another undocumented quirk is that the .GetLeftPart method knows if a Uri is already encoded, so calling it again doesn't result in double encoding. This should be included in the official documentation. Discovering small undocumented behaviors during runtime was not a great experience.
We were under assumption it always to encoding based on previous issue.
Overall, this is a useful method because it removes the SAS token from the URI.

[krwq]

Let me post offline comment on behalf of @MihaZupan:

GetLeftPart is just a shorthand for picking the set of UriComponent flags to pass to GetComponents.

E.g. calling .GetLeftPart(UriPartial.Authority) is the same as calling
.GetComponents(UriComponents.Scheme | UriComponents.UserInfo | UriComponents.Host | UriComponents.Port, UriFormat.UriEscaped)
This is how basically all properties on Uri behave (Host, Query, PathAndQuery, AbsoluteUri, ...)

[erdembayar]

Sure, I just changed the title to clarify the intention for this issue. Please documents what to expect when someone calls this method. Otherwise we have to decompile all the new methods to find out what it does under the hood.