How to do grouping of layer in table of content toolkit

[HarshGupta]

@Michael Branscomb

Hi,

I am using table of content toolkit in arcgis runtime .net sdk  and able to display all mapview layers and picking up sublayer content in context menu but i am unable to  group this layer in treeview layer format.like in arcgis pro

Please help me out i am  stuck here in my development

[HarshGupta]

hi i am stuck here please anyone reply

[MichaelBranscomb · Accepted solution]

Hi,

Does your OperationalLayer collection contain layers of type GroupLayer?

Layer types described—ArcGIS Runtime SDK for .NET | ArcGIS for Developers 

Thanks

Mike

[HarshGupta]

Thanx Michael Branscomb i tried group of layer 

1) At first i picked up a layer from TOC  and add it to group layer class and add that grouplayer to mapview it is displayed in TOC successfully.

2)But next time when i want to add another Layer from TOC to the existing group it will show me an error that object already owned.

3)And one more thing can i pick up multiple layer From TOC and add it to the group Of layer?