How to get Excel Columns Range in Epplus and set its Column Width? -

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example. how in epplus? 

sheet.cells["a1:d1"].column.width = 10;

in excel interop: 

sheet.get_range("a1", "d1").columnwidth = 10;

and start in specific column. not using ws.cells[range]

 int startcolumn = 3; int endcolumn = 10;  (int = startcolumn; <= endcolumn; a++)     {        sheet.column(a).width = 10;     }

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