out of range exception (except it isn't)

[jokul]

i'm using visual studio 2010 and i'm getting the error:

Unhandled Exception: System.ArgumentOutOfRangeException: startIndex cannot be larger than length of string.

Occuring on a call to Substring(int,int);

here's my code (it's testing so there are magic numbers):

            //No out of bounds exceptions
            int temp = end - 150;
            
            if (temp > 0)
            {
                source = source.Substring(temp, end);
            }

source is approximately 32000 characters in length and end is looking at index ~18000 (and obviously temp is index less 150). I have tested it with the parameters such as:

            source = source.Substring(0,end);

and there is no problem, but i have no idea why it would not work with temp. i have tried using a dummy string variable, but as i figured it has nothing to do with the assignment source = source.Substring...

No idea how this can be the case >_>

EDIT: nevermind, i misremembered Substring (second parameter is the number of characters you want to copy).

[jokul]

since i apparently can't edit my post, i do want to say that there was STILL an error when using 0 as a parameter, not that there wasn't.

[DataMiser]

So does substring start at 0? I am acustomed to string functions starting at 1 ??

[Arjay]

So does substring start at 0? I am acustomed to string functions starting at 1 ??

In c# the string index starts at 0.

[Arjay]

Read up on the substring paarameters in msdn.

The 1st param is the starting index. The 2nd param is the lenght of the string to extract.

[boudino]

What if the end excedes lenght of the string?

  source = source.Substring(0, Math.Min(end, source.Length));