public void store(string filename)
{
StreamWriter finmusic = File.CreateText(filename);
List<KeyValuePair<int, int>> history = new List<KeyValuePair<int, int>>();
history = this.gethistory();
for (int i = 0; i < history.Count(); i++)
{
finmusic.WriteLine(history[i].Key);
finmusic.WriteLine(history[i].Value);
}
finmusic.Flush();
finmusic.Close();
}