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{description}
{excerpt}Sets or returns the outline level of the column, as a value between 0 and 7. The outline level is used to control grouping in Excel. For example, to group several columns, set their outline levels to 1; to group a subset of columns within the group, set their outline levels to 2.{excerpt}
{signature:C#}
 public int OutlineLevel{ get; set; }
{signature}{signature:vb.net}
Public Property OutlineLevel() As Integer
{signature}
{example}{code:csharp|title=C#}

          int groupLevel = colProps.OutlineLevel;
          colProps.OutlineLevel = 4;
        {code}
{code:vb.net|title=vb.net}

          Dim groupLevel As Integer = colProps.OutlineLevel
          colProps.OutlineLevel = 4
        {code}

{example}