How to find substring from string without using indexof method in C#?

Question

I want to find the position of a substring in a string if present without using any string method including indexof. I tried so much times but failed. Will anybody tell me h

Answer 1

Try this:

public static string BetweenOf(string ActualStr, string StrFirst, string StrLast)  
{ 
    return ActualStr.Substring(ActualStr.IndexOf(StrFirst) + StrFirst.Length,
          (ActualStr.Substring(ActualStr.IndexOf(StrFirst))).IndexOf(StrLast) + StrLast.Length);    
}