private void AddTodo_Click(object sender, RoutedEventArgs e)
{
//set default values to be added to todo collection
int userIDToPass = 1;
var lastTodo = Todos.Last();
int lastTodoId = lastTodo.id += 1;
bool newCompleted = false;
string titleCreated = AddNewTodoField.Text;
var newTodo = new Todo()
{
userId = userIDToPass,
id = lastTodoId,
title = titleCreated,
completed = newCompleted
};
//add to list of todos at the beginning of the list
Todos.Insert(0, newTodo);
//show new todo in details view
SelectedTodo.Clear();
SelectedTodo.Add(newTodo);
//clear searhc field
AddNewTodoField.Text = "";
}