// Delete Transaction Code
        public async System.Threading.Tasks.Task Delete(EntityDelete delete)
        {
            try
            {
                using (var db = new data.InvoiceContext())
                {
                    await Delete(db, delete);

                    await db.SaveChangesAsync();
                }
            }
            catch (Exception e)
            {
                LogFactory.GetLogger().Log(LogLevel.Error, e);
            }
        }
// Update Transaction Code
        public async Task <EntityView> Update(EntityUpdate update)
        {
            try
            {
                using (var db = new data.InvoiceContext())
                {
                    var result = await Update(db, update);

                    await db.SaveChangesAsync();

                    return((EntityView)result);
                }
            }
            catch (Exception e)
            {
                LogFactory.GetLogger().Log(LogLevel.Error, e);
                return(null);
            }
        }
        // Add Transaction Code
        public async Task <CounterView> Add(CounterAdd add)
        {
            try
            {
                using (var db = new data.InvoiceContext())
                {
                    var result = await Add(db, add);

                    await db.SaveChangesAsync();

                    return((CounterView)result);
                }
            }
            catch (Exception e)
            {
                LogFactory.GetLogger().Log(LogLevel.Error, e);
                return(null);
            }
        }