binding to linq inherited types in asp.net

Dim oComp As IEnumerable(Of Company)
    Dim oInd As IEnumerable(Of Individual)

        oComp = From oP As Company In ERM.Parties _
                 Where TypeOf (oP) Is Company And _
                 oP.Name.StartsWith(sSearchString)

        oInd = From oP As Individual In ERM.Parties _
                Where TypeOf (oP) Is Individual And _
                (oP.FirstName.StartsWith(sSearchString) Or _
                oP.LastName.StartsWith(sSearchString))

        rptIndividuals.DataSource = oInd
        rptCompanies.DataSource = oComp

        rptCompanies.DataBind()
        rptIndividuals.DataBind()

Dim oComp As IEnumerable(Of Party)
    Dim oInd As IEnumerable(Of Party)


        oComp = From oP In ERM.Parties _
                Where TypeOf (oP) Is Company And _
                CType(oP, Company).Name.StartsWith(sSearchString)

        oInd = From oP In ERM.Parties _
                Where TypeOf (oP) Is Individual And _
                (CType(oP, Individual).FirstName.StartsWith(sSearchString) Or _
                CType(oP, Individual).LastName.StartsWith(sSearchString))

        rptIndividuals.DataSource = oInd
        rptCompanies.DataSource = oComp

        rptCompanies.DataBind()
        rptIndividuals.DataBind()

rptCompanies.DataSource = oComp.ToArray ()