how to call tvp from ExecuteFuntion.

hi , is it the right way

DataTable ActivityRoutineParameter = new DataTable();

                ActivityRoutineParameter.Columns.Add("p1", typeof(long));

                ActivityRoutineParameter.Columns.Add("p2", typeof(long));

                System.Data.Objects.ObjectParameter[] objValParams = new System.Data.Objects.ObjectParameter[2];
                objValParams[0] = new System.Data.Objects.ObjectParameter("@tvpActivityRoutineParameter", ActivityRoutineParameter);
                System.Data.Objects.ObjectParameter objValidationResult = new System.Data.Objects.ObjectParameter("xmlResult", typeof(System.String));
                objValParams[1] = objValidationResult;

                var varResponse = context.ExecuteFunction("uspValidation1", objValParams);

CREATE TYPE ActivityRoutineParameter AS TABLE ( PipeFromId BIGINT NULL ,PipeToId BIGINT NULL ) GO

CREATE PROCEDURE uspValidation1 @tvpActivityRoutineParameter dbo.ActivityRoutineParameter READONLY, @xmlResult [xml] = null OUTPUT AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; SELECT @xmlResult END GO