How to update the TextBox Text when updating the TText variable?

Question

WPF

<TextBox  Name="TextBoxText" 
Text="{Binding Source={x:Static  local:G.TText}, Mode=OneWay}"    >
</TextBox>

public /*static*/ class G
  {
    public static string TText { get; set; }

Answer 1

Without perversions in any way, since a static field cannot be the subject of INotifyPropertyChanged and so on.
You either need to build an intermediate wrapper that supports the change notification logic, or manually notify the Binding about the change via UpdateSource.

Answer 2

Theory:
https://msdn.microsoft.com/en-us/library/ms743643(...
Example:
https://msdn.microsoft.com/en-us/library/ms743695(...