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Asked: 2026-05-11T14:05:01+00:00

I want to generate a link on my page where a key/value pair is

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I want to generate a link on my page where a key/value pair is added to the URL dynamically so that:

Default.aspx?key1=value1

Becomes:

Default.aspx?key1=value1&key2=value2

So that the existing query retains any keys in the URL. Also, if there are no keys, then my key would be added, along with the ‘?‘ since it would be needed.

I could easily write some logic that does this, but this seems like something that the framework should have a utiltity for. Is there any way to add keys to a query string without writing my own logic for it?

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1 Answer

  1. I know, it’s strange this is not supported properly in the .NET Framework. A couple of extensions to UriBuilder will do what you need though.

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