c# - Returning current user on a website with Windows Authentication in IIS 7.5 -

using iis 7.5, iis settings, web.config settings , c# code needed return current windows user?

web.config values are

<authentication mode="windows"> <identity impersonate="true" /> 

applicationconfig values are

            <windowsauthentication enabled="true">                 <providers>                     <add value="negotiate" />                     <add value="ntlm" />                 </providers>             </windowsauthentication> 

don't seem trick.

make sure set windows authentication enabled in visual studio project's properties. in project file (.csproj), translates to:

<iisexpresswindowsauthentication>enabled</iisexpresswindowsauthentication> 

also, set managed pipeline mode project property classic:

<iisexpressuseclassicpipelinemode>true</iisexpressuseclassicpipelinemode>