Hi,
You can do this my applying your CultureInfo to the "ta-in";
System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("ta-in");
System.Threading.Thread.CurrentThread.CurrentUICulture = new CultureInfo("ta-in");
and then you need to store all the tamil specific letters, word, or strings(messages) you use in the pages in to a resource file,
You can do this by Clicking Tools>GenerateLocalResources in the visual studio.
This will generate a .resx file for each page. So there you need to put your Tamil specific strings.
After doing the "Tools>GenerateLocalResources ", you can see that, each of your webcontrol will be having a meta:resourcekey="<keyname>" this will be added automatically. And this is responsible for fetching the Tamil strings from the resource file of corresponding key at runtime.
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Suresh M
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