Need To Know How To Return Row Count From SP

How can I tell if table "CompanyInfo" has any rows?  Below is the partial code behind and the SP I am running to fill CompanyInfo;

PROCEDURE newdawn.AcceptSubmission
@CompanyID int
AS
SELECT  C_ID, CG_ID, LS_ID, L_Rank, L_Name, L_URL,
FROM    tblStoreSubmit
WHERE C_ID = @CompanyID
RETURN


 SqlCommand cmd3 = new SqlCommand("AcceptSubmission", con);
 cmd3.CommandType = CommandType.StoredProcedure;
 cmd3.Parameters.AddWithValue("@CompanyID", CompanyID);
 SqlDataAdapter da = new SqlDataAdapter();
 da.SelectCommand = cmd3;
 DataSet ds = new DataSet();
 try
    {
       da.Fill(ds, "CompanyInfo");