unable to read values from global resorce file using HttpContext.GetGlobalResourceObject

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ASP.NET

Hi,
I have a resorce file as res.en-US.resx and res.hi-IN.resx with key-value as

key       value 

btnidNew  New
btn_Refresh Refresh

I want to read value from the resource file and dsislay it in label or div for localisation
for that i have wriiten code as

btn_Refresh.Value = ResourceProvider.GetLocalValue("btn_Refresh");

public static string GetLocalValue(string Key)
   {
       return ResProvider.GetLocalValue(Key, Culture);
   }

public string GetLocalValue(string Key, CultureInfo Culture)
   {
       string retVal = string.Empty;
       try
       {
           retVal = HttpContext.GetGlobalResourceObject("res", Key, Culture).ToString();

           //retVal = HttpContext.GetLocalResourceObject("loc", Key, Culture).ToString();
       }
       catch (Exception ex)
       {
       //do any loging
           string jjj = "";
           jjj = "ffffff";
          // NullReferenceException es;
       }
       return retVal;
   }

but it is returning empty string .Please help or provide me some alternative solution