Vb.net linq expression to C# linq express

Dim query = From order In Temp_Data.AsEnumerable().Where(Function(x) x.Field(Of String)("VesselType") = param_vesseltype And x.Field(Of String)("VoyageType") = param_voyagetype)
                                Group order By VesselID = order.Field(Of String)("VesselID"), VesselName = order.Field(Of String)("VesselName") Into g = Group
                                Select New With {
                                     .VesselName = VesselName,
                                    .VesselId = VesselID,
                                    .tot_ifo = g.Sum(Function(order) order.Field(Of Double)("Tot_Ifo")),
                                    .tot_ifols = g.Sum(Function(order) order.Field(Of Double)("Tot_Ifols")),
                                    .tot_mdols = g.Sum(Function(order) order.Field(Of Double)("Tot_mdols")),
                                    .tot_mdo = g.Sum(Function(order) order.Field(Of Double)("Tot_mdo")),
                                    .Co2 = g.Sum(Function(order) order.Field(Of Double)("Co2")),
                                    .Nox = g.Sum(Function(order) order.Field(Of Double)("Nox")),
                                    .Sox = g.Sum(Function(order) order.Field(Of Double)("Sox"))
                                    }