MainPage.xaml.cs

//Delete
        public Task<int> DeleteItemAsync(Person person)
        {
            return db.DeleteAsync(person);
        }



private async void BtnDelete_Clicked(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(txtPersonId.Text))
            {
                //Get Person
                var person = await App.SQLiteDb.GetItemAsync(Convert.ToInt32(txtPersonId.Text));
                if (person != null)
                {
                    //Delete Person
                    await App.SQLiteDb.DeleteItemAsync(person);
                    txtPersonId.Text = string.Empty;
                    await DisplayAlert("Success", "Person Deleted", "OK");
                    
                    //Get All Persons
                    var personList = await App.SQLiteDb.GetItemsAsync();
                    if (personList != null)
                    {
                        lstPersons.ItemsSource = personList;
                    }
                }
            }
            else
            {
                await DisplayAlert("Required", "Please Enter PersonID", "OK");
            }
        }