How do i...edit data grid without events of datagrid in WPF

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C#

WPF

I have a class that has a double variable. I want to enter the number entered in the data grade cells without using data grade events when I enter a number after press enter send value in data grid cell to variable d with a function or method inside the class.

XAML Code:

<StackPanel>
<DataGrid   Height="120" Name="Grid" Margin="5" />
<Button  Margin="10" Click="ButtonBase_OnClick" >Click</Button>
</StackPanel>

CS code:

namespace WpfApp4
{
    {
        private double d ;
        public   double D
        {
            set
            {
                d = value;
            }
            get
            {
                return d;
            }
        } 

        public override string ToString()
        {
            return D.ToString();
        }
    }

    public partial class MainWindow : Window
    {
        DataTable dt = new DataTable();
        MyClass myClass1=new MyClass();
        MyClass myClass2=new MyClass();
        public MainWindow()
        {
            InitializeComponent();
            dt.Columns.Add(new DataColumn("Double", typeof(MyClass)));
            dt.NewRow();
            dt.Rows.Add(myClass1);
            dt.Rows.Add(myClass2);
            Grid.ItemsSource= dt.DefaultView;
        }
        private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
        {
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                MessageBox.Show("Value Datatable rows is:" + dt.Rows[i]["Double"]);
            }
            MessageBox.Show("Value D is :" + myClass1.D);        
        }

    }
}

What I have tried:

i can solve it event of datagrid ( cells edit ending) but i want solve it with class and methods