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We have prepared the simple MVVM sample using PropertyGrid and SfDiagram controls. In this sample, while selecting the node we have bound the node to “SelectedObject” property of PropertyGrid. Also using “CustomEditorCollection” of ProperrtyGrid control, we have displayed properties (like MinWidth,MinHeight,UnitHeight,UnitWidth,Opacity and etc.) in Updown control as ValueEditor.
Please download the sample from the below location.Sample:PropertyGridMVVM
Let us know if you need any other assistance on this.