Request[“key”] vs Request.Params[“key”] vs Request.QueryString[“key”]

Question

Request[\"key\"] vs Request.Params[\"key\"] vs Request.QueryString[\"key\"]

Which method do you seasoned programmers use? and

Answer 1

As a kindly notice, If you set requestValidationMode="4.5" under web.config, both Request.QueryString[“key”] and Request[“key”] will use "lazy loading" behavior as design.

However, somehow Request.Params[“key”] will still trigger validation as the behavior of 4.0 .

This odd behavior really confuses me for a long time.