Request.QueryString[] param names always case insensitive ?

[John A Grandy]

I have always extracted query string params assuming that I could specify
the param name case-insensitive :

string param = Request.QueryString[{case-insensitive param-name}];

Is there any scenario in which this would not work (i.e. case mismatch
between param-name used in query-string and param-name I specify in code) ?

Thanks.