C#

string s1 = "XXSPHello";
string s2 = "XaSPGoodbye";
Regex r = new Regex(@"^XXSP");
if (r.Match(s1).Success)
    {
    MessageBox.Show(s1);
    }
if (r.Match(s2).Success)
    {
    MessageBox.Show(s2);
    }

^((X[^X])|(XX[^S])|(XXS[^P])).*$

private void MyForm_Load(object sender, EventArgs e)
{
          string myString = "Fred";
          ..........
          ..........
          ..........
        }

        private string myString;
private void MyForm_Load(object sender, EventArgs e)
{
          myString = "Fred";
          ..........
          ..........
          ..........
        }

StreamReader sr = new StreamReader("file1");

string line = sr.ReadLine();

while(line != null)
{
    //do something with the line
    line = sr.ReadLine();
}

sr.close();

StreamReader sr2 = new StreamReader("file2");

string line2 = sr2.ReadLine();

while(line2 != null)
{
   string hid = line2.Substring(0, 11);
   
   if(hid == line1)
   {
      //Do something with the stream writer
      break;//Break the while loop
   }

   line2 = sr2.ReadLine();
}

sr2.Close();

musefan wrote:

Are they one per line in the file? or is there more than one on each line?