Dapper Contrib Output Parameter

Question

I'm research about Dapper Contrib Storeprocedure and I donn't know how to get value Output Parameter from the procedure, this is my store procedure:

ALTER PROC [dbo].[spCustomPaging]
    @SkipCount INT,
    @PageSize INT, /*record in 1 page*/
    @TotalRows INT OUTPUT /*tong record*/
AS
BEGIN
SET NOCOUNT ON;
    
    SELECT @TotalRows = COUNT(*)
    FROM dbo.Product

    SELECT *
    FROM dbo.Product
    ORDER BY ProductID OFFSET @SkipCount ROW FETCH NEXT @PageSize ROWS ONLY 

And This is my Dapper Contrib query:

db.Query<Models.Product>("spCustomPaging", new { SkipCount = skip, PageSize = pageSize }, commandType: System.Data.CommandType.StoredProcedure);

How I can get the TotalRow from the store with Dapper Contrib? Sorry for my bad English and Thank You.