Bind FlowDocument with a property WPF

i have a property in my class

 public FlowDocument FlowDocument { get; set; }

i want to bind this property to RichTextBox FlowDocument from xaml.like for textbox we write

 <TextBox Text="{Binding Path=Data}" />

how to do it.please help. i can not access the control directly so i am passing data model to control.