Hi Michael,
Thanks for you interest in Syncfusion products.
If your intention is to change the column definition, please refer the below code snippet to do so.
this.grid.TableDescriptor.Columns[0].HeaderText = "Name";
this.grid.TableDescriptor.Columns[1].HeaderText = "Descriptor";
this.grid.TableDescriptor.Columns[2].HeaderText = "Value";
Please download the sample from the below link:
http://websamples.syncfusion.com/samples/Grid.Windows/F%2069298/main.htmPlease let me know if you have any other queries.
Best Regards,
Bhuvana