Generic method to populate dropdown list in asp .net

An attempt of making the dropdown list population easier for everyday projects :)

 ///  
 /// Populates the drop down list box with given list type.  
 ///  
 /// The dropdown list to be populated.  
 /// The data source.  
 /// The datatext field for the dropdown list.  
 /// The datavalue field for the dropdown list.  
 /// The selected value, if any.  
 /// Whether to add an empty value (e.g.--Select--).  
 public static void PopulateDropDownList(DropDownList dropDownList, IList dataSource, string dataText, string dataValue, string selectedValue, bool addEmptyValue)  
 {  
 if (dropDownList != null && dataSource != null)  
 {  
 if (dropDownList.Items != null)  
 {  
 dropDownList.Items.Clear();  
 }  
 dropDownList.DataSource = dataSource;  
 dropDownList.DataTextField = dataText;  
 dropDownList.DataValueField = dataValue;  
 dropDownList.DataBind();  
 if (addEmptyValue)  
 {  
 dropDownList.Items.Insert(0, new ListItem("--Select--", "-1"));  
 }  
 if (!string.IsNullOrEmpty(selectedValue))  
 {  
 dropDownList.SelectedValue = selectedValue;  
 }  
 }  
 }