Linq to Sql Framework 4

Hi,

I'm using Linq-To-Sql.

Given the following code:

casefile.cs

publicpartialclasscasefile
{
     publicstaticint getCaseId(string asCaseNumber)
  {
           int aiCaseId = -1;

     using (CMSDataContext dc =new CMSDataContext())
     {
                 aiCaseId = (from cin dc.casefile
                    where c.case_nbr == asCaseNumber
                    select c.case_id).FirstOrDefault();

        if (aiCaseId ==null || aiCaseId < 1)       
                {
                       thrownewException(String.Concat("Case Number ", asCaseNumber, " not found."));
        }
          }

  return aiCaseId;
}
}

WebFormCMSCopyCommentEvent.aspx.cs

publicpartialclassWebFormCMSCopyCommentEvent : System.Web.UI.Page
{

      protectedvoid ButtonShowRecords_Click(object sender,EventArgs e)         
            {
                    //validate CaseIds
          int aiCaseId1 =casefile.getCaseId(TextBoxCaseNo1.Text); errors here => CS0117: casefile does not get a definition for 'getCaseId'

      }
}

}

Thanks,

tinac99