How to add specific Level element in OlapReport

[C#]

OlapReport olapReport = new OlapReport();

olapReport.CurrentCubeName = "my_cube";

//// Creating a dimension element object

DimensionElement dimensiontElementProduct = new DimensionElement();

dimensiontElementProduct.Name = "my_dim";

dimensiontElementProduct.AddLevel("my_hierarchy", "my_level");

olapReport.SeriesElements.Add(new Item { ElementValue = dimensiontElementProduct });