private void Apply_Click(object sender, RoutedEventArgs e) { if (isCreated) { string MembersString = IDofExistMembers[0].Content.ToString(); for (int i = 1; i < IDofExistMembers.Count; i++) { MembersString += ' ' + IDofExistMembers[i].Content.ToString(); } sql.EditChats(ID, MembersString, name.Text, ChatData.PathToPhoto); this.Close(); } else { string MembersString = IDofExistMembers[0].Content.ToString(); for (int i = 1; i < IDofExistMembers.Count; i++) { MembersString += ' ' + IDofExistMembers[i].Content.ToString(); } sql.newChat(name.Text, PathToPhoto, ID, MembersString); this.Close(); } }