(VB .NET) A Method for Search Values in Several Fields of Entity Framework DataTable

Public DataEntity As New KeyStoreEntities
Function SearchFor(Of T)(value As String, ParamArray Fields() As String) As Objects.ObjectQuery(Of T)
        ListItemButtons.Clear()
        Dim UserAccountParam As New Objects.ObjectParameter("UserAccount", UserAccount.ToLower)
        Dim SearchValueParam As New Objects.ObjectParameter("Value", "%" + value + "%")


        Dim QueryString As String = String.Format("SELECT VALUE {0} FROM {0} WHERE ({0}.UserAccount = @UserAccount)",
                                                  GetType(T).Name)
        For Each Field As String In Fields
            Dim Operate As String = If(Array.IndexOf(Fields, Field) = 0, "AND", "OR")
            QueryString += String.Format(" {0} {1}.{2} LIKE @Value", Operate, GetType(T).Name, Field)
        Next
        Return DataEntity.CreateQuery(Of T)(QueryString, UserAccountParam, SearchValueParam)
    End Function

Dim ListItems As Objects.ObjectQuery(Of Websites) =
                            SearchFor(Of Websites)(UserAccount, Me.ToolStripTextBox1.Text, "Title", "Address", "MailBox",
                                                        "UserName")