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Document Unicode encoding behavior in Uri.GetLeftPart method #11479

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Jun 20, 2025
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Document Unicode encoding behavior in Uri.GetLeftPart method #11479

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Document Unicode encoding behavior in Uri.GetLeftPart method
Copilot Jun 19, 2025
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6 changes: 6 additions & 0 deletions xml/System/Uri.xml
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Expand Up @@ -2442,6 +2442,12 @@ If you used an escaped string to construct this instance (for example, `"http://

The <xref:System.Uri.GetLeftPart%2A> method returns a string containing the leftmost portion of the URI string, ending with the portion specified by `part`.

> [!IMPORTANT]
> The <xref:System.Uri.GetLeftPart%2A> method performs Unicode character encoding and normalization as part of its processing. It is not a simple string manipulation method. The returned string may differ from the original URI string due to this encoding behavior.

The <xref:System.Uri.GetLeftPart%2A> method is equivalent to calling <xref:System.Uri.GetComponents%2A> with the appropriate <xref:System.UriComponents> flags. For example:
- `GetLeftPart(UriPartial.Authority)` is equivalent to `GetComponents(UriComponents.Scheme | UriComponents.UserInfo | UriComponents.Host | UriComponents.Port, UriFormat.UriEscaped)`

<xref:System.Uri.GetLeftPart%2A> includes delimiters in the following cases:

- <xref:System.UriPartial.Scheme> includes the scheme delimiter.
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