private void GetFileInDirectory()
{
    textfile = new string[200];
    try
    {
        string [] files;
        string path = currentPictureFile.Substring(0, currentPictureFile.LastIndexOf("\\") + 1);
 
        if ( Directory.Exists(path) )
        {
            files = Directory.GetFiles(path);
            int i = 0;
            foreach ( string fileName in files )
            {
                int lastIndex = fileName.LastIndexOf(".");
                if ( fileName.Length - lastIndex - 1 == 3 )
                {
                    string ext = fileName.Substring(lastIndex + 1, 3).ToUpper();
                    if ( (ext.Equals("txt" ) ) 
                    {
                        textfile[i++] = fileName;
                    }
                }
 
            }
 
        }
    }
 
	catch (IOException ioE)
	{
        MessageBox.Show("Error - wrong path");
	}
 
	catch (UnauthorizedAccessException unE)
	{
 
	}
}