missing sqlparameter add method

[jlbantang]

Hi guys, Im trying to follow this sample of inserting data through gridview rowcommand. But somehow Im missing the sqlparameter add method whilst the namespace was already added.

 

//sqlparameter declaration of list type
 private List<SqlParameter> insertParameters = new List<SqlParameter>();


mygridview_rowcommand(...){
 SqlParameter _prm_guid = new SqlParameter("@pk_guid", SqlDbType.VarChar);
 _prm_guid.Direction = ParameterDirection.Input;
 _prm_guid.Value = thisguid;
           
  insertParameters.add(?); //error on add()

}

Some other part of the code which related to insertParameters variable it give an error

for statement cannot operate on variables of type List<System.Data.SqlClient.SqlParameter> because List<System.Data.SqlClient.SqlParameter> does not contain a public definition of GetEnumerator

Am I missing a file reference? Appreciate an help.