asp.net addresses browser compatibility issues with server side code

Use the code to determine which version of the browser the client is using
Response. Write (Request. ServerVariables [" HTTP_USER_AGENT] "); (this seems to work on ASP as well.)
or
Response.Write(Request.UserAgent);

Mine is IE7 output:

Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SE 1.X; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; SE 1.X)

Google browser output:

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.195.38 Safari/532.0

Write a public method call in the background (reference to be added)

public static int getBrowser() 
{ 
string BrowserInfo = HttpContext.Current.Request.UserAgent; 
if (BrowserInfo.Contains("MSIE 7.0")) 
{//IE7 
return 1; 
} 
else if (BrowserInfo.Contains("MSIE 6.0")) 
{//IE6 
return 2; 
} 
else if (BrowserInfo.Contains("Firefox")) 
{//IE6 
return 3; 
} 
else if (BrowserInfo.Contains("Chrome")) 
{// Google  
return 4; 
} 
return 5; 
}