if text exists C#
string s1 = "The quick brown fox jumps over the lazy dog";
string s2 = "fox";
bool b = s1.Contains(s2);
Console.WriteLine("'{0}' is in the string '{1}': {2}",
s2, s1, b);
if (b) {
int index = s1.IndexOf(s2);
if (index >= 0)
Console.WriteLine("'{0} begins at character position {1}",
s2, index + 1);
}
// This example displays the following output:
// 'fox' is in the string 'The quick brown fox jumps over the lazy dog': True
// 'fox begins at character position 17