how to extract substring from a string?

this is one way to do it:

ArrayList links = new ArrayList();
 int e = 0; int linkStartPos = 0; int linkEndPos = 0;  int s = 0;
while ((linkStartPos >= 0) & (linkEndPos >= 0))
{
     linkStartPos = myString.IndexOf("", s, StringComparison.CurrentCultureIgnoreCase);
      if (linkStartPos >= 0) linkStartPos = linkStartPos + 6;
      linkEndPos = myString.IndexOf("", e, StringComparison.CurrentCultureIgnoreCase);
      if ((linkStartPos >= 0) & (linkEndPos >= 0)) links.Add(myString.Substring(linkStartPos, linkEndPos - linkStartPos));
      s = linkStartPos; e = linkEndPos + 7;
 }

the title part is pretty much the same.

I'm a noob to C#, but maybe this peace of code kan give you an idea :

        string tagToBeSplit = "this is the string to be written";
        Response.Write(tagToBeSplit.Split(new string[2]{ "","" }, StringSplitOptions.RemoveEmptyEntries)[0]);