async private void save_click(object sender, RoutedEventArgs e) { try { Windows.Storage.StorageFile file = null; Windows.Storage.StorageFolder local = Windows.Storage.ApplicationData.Current.LocalFolder; XmlDocument xmlDoc = new XmlDocument(); xmlDoc.LoadXml("<profile/>"); XmlElement userNode = xmlDoc.CreateElement("username"); XmlElement emailNode = xmlDoc.CreateElement("email"); XmlElement phoneNode = xmlDoc.CreateElement("phone"); XmlCDataSection userName = xmlDoc.CreateCDataSection(input_username.Text); XmlCDataSection email = xmlDoc.CreateCDataSection(input_email.Text); XmlCDataSection phone = xmlDoc.CreateCDataSection(input_phone.Text); userNode.AppendChild(userName); emailNode.AppendChild(email); phoneNode.AppendChild(phone); xmlDoc.DocumentElement.AppendChild(userNode); xmlDoc.DocumentElement.AppendChild(emailNode); xmlDoc.DocumentElement.AppendChild(phoneNode); bool createFile = false; try { file = await local.GetFileAsync("profile.xml"); } catch { createFile = true; } if(createFile) { file = await local.CreateFileAsync("profile.xml"); } await xmlDoc.SaveToFileAsync(file); } catch { } this.navigationHelper.GoBack(); }