[]
Gets or sets the text orientation. Can be an integer value from –90 to 90 degrees.
Use this property to define or retrieve the text rotation stored in the style.
int Orientation { get; set; }
Property Orientation As Integer
IStyle style = workbook.Styles.Add("angledStyle");
style.Orientation = 45;
worksheet.Range["A1"].Style = style;
int orientation = style.Orientation;