Answer Posted / sagnikmukh

i am posting the basic logic,

class Program
{
static void Main(string[] args)
{
string test = "123";
StringBuilder st=new StringBuilder ();
int l;
l = test.Length;
for (int i = l; i > 0; i--)
{
st = st.Append(test.Substring(i - 1,
1).ToString ());
}
Console.WriteLine(st.ToString ());
Console.Read();
}
}

this will be the Button event in ASP.NEt Page.

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