What is Querystring collection?

Answer Posted / sowmya

The QueryString collection is used to retrieve the variable
values in the HTTP query string.

The HTTP query string is specified by the values following
the question mark (?), like this:

<a href= "test.asp?txt=this is a query string test">Link
with a query string</a>

The line above generates a variable named txt with the
value "this is a query string test".

Query strings are also generated by form submission, or by
a user typing a query into the address bar of the browser.

Request.QueryString(variable)[(index)|.Count]

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