Kendo Binding to DataTable with additional custom column

Kendo Binding to DataTable with additional custom column

Someone pointed me to Kendo Bind to Data Table, which has this code in the
grid builder:
.Columns(columns =>
{
foreach (System.Data.DataColumn column in Model.Columns)
{
columns.Bound(column.ColumnName);
}
})
This works, but I also want to add an "edit" column, so I added this line
before the foreach:
columns.Command(command =>
command.Edit().Text("Edit").UpdateText("Submit")).Width(70).HtmlAttributes(new
{ style = "text-align: right;" });
which throws "Templates can be used only with field access, property
access, single-dimension array index, or single-parameter custom indexer
expressions."
How can I add an Edit column?