Extract part of a string between point A and B

Question

I am trying to extract something from an email. The general format of the email will always be:

blablablablabllabla hello my friend.

[what I want]

Goodbye          


        

Answer 1

string s1 = "find a string between within a lengthy string";
string s2 = s1.IndexOf("between").ToString();
string output = s1.Substring(0, int.Parse(s2));
Console.WriteLine("string before between is : {0}", output);
Console.ReadKey();