index out of range exception??

question:
    
    index out of range exception??error code :    if (!Convert.IsDBNull(reader["Name"]))
                    username = reader["Name"].ToString();
sources code:         public bool LoginUser(string username,string pwd)
        {
            
            bool exists = false;
            SqlParameter[] parms = new SqlParameter[2];
            parms[0] = new SqlParameter("@name", SqlDbType.NVarChar, 100);
            parms[1] = new SqlParameter("@password", SqlDbType.NVarChar, 100);
            parms[0].Value = username;
            parms[1].Value = pwd;
            SqlDataReader reader = DbTools.ExecuteReader("LoginUserProce", parms);            if (reader.Read())
            {
                exists = true;
                if (!Convert.IsDBNull(reader["name"]))
                    username = reader["name"].ToString();
                if (!Convert.IsDBNull(reader["password"]))
                    pwd = reader["password"].ToString();
                    
            }
            reader.Close();
            return exists;           
        }