Solution

Just put this piece of code in the Web Config file and be happy !!!!!!

<system.webServer>

<rewrite>

<rules>

<rule name="RewriteASPX">

<match url="(.*)" />

<conditions logicalGrouping="MatchAll">

<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />

<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />

</conditions>

<action type="Rewrite" url="{R:1}.aspx" />

</rule>

</rules>

</rewrite>

</system.webServer>

And just the page name in the link as it is for Example see this:-

<a href="Index.aspx">Sign in</a> 1.Don't use this
<a href="Index">Sign in</a> 1.Use this