Question

in the textbox when we pass the text within “< >” bracket then it shows the error like
A potentially dangerous Request.Form value was detected from the client (grouplink$txtAddPerson=”

Answer 1

You can disable it for a single page;

<%@ Page validateRequest="false" %> 

Or using the web.config for all pages

<configuration>
   <system.web>
      <pages validateRequest="false" />
   </system.web>
</configuration>

You might want to HtmlEncode your input to keep you safe from Scriptinserts