Do field in a XamDataGrid mimic how Columns behave in DataGrid?  Because even though a column is not in the Visual Tree of DataGrid you are still able to bind do it with the following:

 <DataGrid Name="dgvMain">
<DataGrid.Resources>
<rent:BindingProxy x:Key="proxy" Data="{Binding}" />
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn x:Name="dgcFooBar" Visibility="{Binding Path=Data.ShowFooBar}" />
</DataGrid.Columns>
</DataGrid>

BindingProxy looks like this:

Public Class BindingProxy
Inherits Freezable
#Region "Overrides of Freezable"

Protected Overrides Function CreateInstanceCore() As Freezable
Return New BindingProxy()
End Function

#End Region

Public Property Data() As Object
Get
Return DirectCast(GetValue(DataProperty), Object)
End Get
Set(value As Object)
SetValue(DataProperty, value)
End Set
End Property

' Using a DependencyProperty as the backing store for Data. This enables animation, styling, binding, etc...
Public Shared ReadOnly DataProperty As DependencyProperty = DependencyProperty.Register("Data", GetType(Object), GetType(BindingProxy), New UIPropertyMetadata(Nothing))
End Class

Would this method work for binding with XamDataGrid??

Please note that I am using 15.1

Fields are not part of the visual tree of the XamDataGrid, so you cannot use bindings. You could handle the property changed event of your underlying source class and set the visibility manually if this is not an option for you.

Thanks, I think it works this way. 

BUT,  it looks like hack to me, XamDataGrid really should have a built in way to pass its data context to the Field, without requirign application to have special code to add the data context to the application resource...

Is it possible to bind the Visibility of a field to the DataItem for the field?