extracting substring

[Ankit Aneja]

string comm="CONTSCAN E:\\projects backup\\ankitclam
backup\\Clamtest\\testing\\hello.txt\r\n"
int x=comm.Length;
x=x-7;
string path;
path=comm.Substring(9,x);
MessageBox.Show(path);

it works fine and give path as
E:\projects backup\ankitclam backup\Clamtest\testing\hello.txt

but when i give path
string comm="CONTSCAN E:\\projects backup\\ankitclam
backup\\Clamtest\\testing\r\n"
int x=comm.Length;
x=x-7;
string path;
path=comm.Substring(9,x); //crashes here
MessageBox.Show(path);

crashes on line : path=comm.Substring(9,x);

throwing exception
System.Argument.OutOfRangeException:Index and length must refer to location
within the string.
Parameter name:length
at System.String.Substring(Int32 startIndex,Int32 length)