C# string/stringreader help needed (how to read each line from a string?)

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i'm having trouble figuring out how to read each line from a string i have a string created from a file (it contains the whole multi-line file content) but neither string nor stringreader seems to have a lines property or anything i could use to know when i'm done reading the last line (so i have no idear how i could use stringreader.readline to read all lines in the string since i don't know when i got to the last one & will get an exception) is there any standard way to do this or am i supposed to get the linecount from the file or watch for an exception or something?

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Edit I just reread your post what I did is add END to the end of my file and when I read that from the file I knew it was done. I also have seen people check to see if readLine() returns null.

Here is a sample that I did to load a list of waypoints to a file. This was a console app I made to test my class for a game I am making.

    class Program    {        static void Main(string[] args)        {            Console.WriteLine("Loading Level");            Level lev = new Level();        }    }    class Level    {        Waypoints tmp;        ArrayList currentWaypoints;        StreamReader file;        public Level()        {            Console.WriteLine("In Level Constructor");            LoadLevel1();        }        private void LoadLevel1()        {            file = new StreamReader("level1.txt");            tmp = new Waypoints();            currentWaypoints = new ArrayList();            tmp.setLeft(8);            tmp.setRight(47);            currentWaypoints.Add(tmp);            string nextString = file.ReadLine();            Console.WriteLine(nextString);            if (nextString.Contains("Waypoint"))            {                while (nextString != "END")                {                    tmp.setRight(99);                    tmp.setLeft(99);                    tmp.setDown(99);                    tmp.setUp(99);                    if (nextString.Contains("Vector"))                    {                        int x, y;                        int beginningOfX = nextString.IndexOf('x')+1;                        int beginningOfY = nextString.IndexOf('y', beginningOfX)+1;                        x = Convert.ToInt32(nextString.Substring(beginningOfX, beginningOfY - beginningOfX - 1));                        y = Convert.ToInt32(nextString.Substring(beginningOfY));                        Console.Write("Position.x = ");                        Console.WriteLine(x + 64);                        Console.Write("Position.y = ");                        Console.WriteLine(y + 64);                    }                    nextString = file.ReadLine();                    int nextNode = 0;                    while (!nextString.Contains("Waypoint") && nextString != "END")                    {                        if (nextString.Contains("Up"))                        {                            nextNode = Convert.ToInt32(nextString.Substring(3));                            tmp.setUp(nextNode);                        }                        if (nextString.Contains("Down"))                        {                            nextNode = Convert.ToInt32(nextString.Substring(5));                            tmp.setDown(nextNode);                        }                        if (nextString.Contains("Left"))                        {                            nextNode = Convert.ToInt32(nextString.Substring(5));                            tmp.setLeft(nextNode);                        }                        if (nextString.Contains("Right"))                        {                            nextNode = Convert.ToInt32(nextString.Substring(6));                            tmp.setRight(nextNode);                                                    }                        Console.WriteLine(nextNode);                        nextString = file.ReadLine();                    }                    currentWaypoints.Add(tmp);                }            }//End while            file.Close();            Console.WriteLine("Total Size of ArrayList is");            Console.WriteLine(currentWaypoints.Count);        }    }}

This is what a portion of my file looks like

Waypoint 1 Vector x17 y17
Right 2
Down 5
Waypoint 2 Vector x97 y17
Right 3
Down 4
Waypoint 3 Vector x129 y17
Left 2
Waypoint 4 Vector x97 y49
Right 38
Left 63
Waypoint 5 Vector x17 y81
Right 6
Down 7
Waypoint 6 Vector x65 y81
Up 63
Down 12

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Reading the file one line at a time is probably the best method. However there is no need to use an "END" string, the StreamReader.ReadLine method will return null when the end of the stream is reached.

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thank you both (i'm mostly learning the basics so my books don't go that in depth & most of the api's function i get from intellisence & the comment on readline didn't specify it would return null, thanks for putting with me & the help ratings++inc)