Data Binding Concept in C#

public void cmb_Load()
{
DataSet dS=new DataSet();
dS = SqlHelper.ExecuteDataset(con.GetConnectionString(), CommandType.StoredProcedure, "Sp_CompanyName_Disp");
cmbBranch.DataSource = dS.Tables[0];
cmbBranch.DisplayMember = "Comp_Name";
cmbBranch.ValueMember = "Comp_Id";
}