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Editorial Team
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Asked: 2026-05-19T00:31:56+00:00

I use something like this in my C# program: Uri myuri = new Uri(toCheck);

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I use something like this in my C# program:

Uri myuri = new Uri(toCheck);
...
...
if (myuri.Contains("string here"))
{
...
}

Is the Uri function trying to connect to the remote server for getting the hostname?
I ask for performance reasons..

How would be the best way for determinating the hostname of an address like “http://website.com/news/page.php?id=1&news=5

thanks 🙂

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1 Answer

  1. Editorial Team

    No, System.Uri is purely a string-handler, nothing there interacts with the network.

    To get the HostName, use the GetLeftPart function and pass in the desired UriPartial value:

    var uri = new Uri(@"http://website.com/news/page.php?id=1&news=5");
var hostname = uri.GetLeftPart(UriPartial.Authority); // http://website.com
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