WPF繫結到變數時非常簡單，只需要在相應的類裡稍加修改即可：

        public class Example : INotifyPropertyChanged
        {
            private string name;
            public string Name
            {
                get { return name; }
                set
                {
                    name = value;
                    if (PropertyChanged != null)
                    {
                        PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Name"));
                    }
                }
            }
            public event PropertyChangedEventHandler PropertyChanged;
        }
 

            exam = new Example();
            txt1.SetBinding(TextBox.TextProperty, new Binding()
            {
                Source = exam,
                Path = new PropertyPath("Name")
            });

            exam.Name = DateTime.Now.ToString("yyyy-MM-dd-dddd HH:mm:ss");