Reading external TXT file with streamreader gives ans IO ERROR

Hi,
I am strangling to find an error to my reading txt file code because i getting this error. Could soumeone help please!!


code:

public void ReadServerFile(string nameOfFile) {

string file = System.IO.Path.Combine (MyAppsDataPath, System.IO.Path.GetFileName (nameOfFile));

try{

using (StreamReader SR = new StreamReader (file))
{
string line;
while (!string.IsNullOrEmpty (line = SR.ReadLine ())) {
line.Trim();
string[] parts = line.Split (new char[] { ',' });
TargetInfo objTargetInfo = new TargetInfo ();
objTargetInfo.texta = parts [0];
objTargetInfo.textb= parts [1];
objTargetInfo.textc= parts [2];
lines.Add (objTargetInfo);
}
SR.Close ();
}
}

catch(IOException e){
Debug.Log (e);
}
}


error
System.IO.IOException: Sharing violation on path C:\Users\koukos\AppData\LocalLow\yourwed_gr\testcodes\mtf\eanos.txt
at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00251] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/FileStream.cs:320
at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0
at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
at System.IO.File.OpenRead (System.String path) [0x00000] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/File.cs:363
at System.IO.StreamReader..ctor (System.String path, System.Text.Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) [0x00077] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/StreamReader.cs:167
at System.IO.StreamReader..ctor (System.String path) [0x00000] in <filename unknown>:0
at (wrapper remoting-invoke-with-check) System.IO.StreamReader:.ctor (string)
at DataHandler.ReadServerFile (System.String nameOfFile) [0x00015] in G:\ANDROID\unity projcts\testcodes\Assets\MyScripts\Data\DataHandler.cs:83
UnityEngine.Debug:Log(Object)
DataHandler:ReadServerFile(String) (at Assets/MyScripts/Data/DataHandler.cs:100)
DataHandler:Start() (at Assets/MyScripts/Data/DataHandler.cs:39)