Any chance of a sample sometime or some documentation? Glad to hear it's actively maintained / up to date. I'll start poking at it. 

The Sage100.ObjectManagement code is pretty well documented, and here is a real simple example of creating a customer and then deleting it.

using Sage100.ObjectManagement;
using Sage100.ObjectManagement.Interfaces;
using System;
using System.Net;

namespace SageCityDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var homePath = @"C:\Sage\Sage 100 Advanced\MAS90\Home";
            var userName = "test";
            var password = "pa$$word";
            var companyCode = "ABC";

            var sessionLogon = new SessionLogon
            {
                CompanyCode = companyCode,
                UserLogon = new NetworkCredential { UserName = userName, Password = password },
                ModuleCode = ModuleNames.AccountsReceivable,
                ModuleDate = DateTime.Today
            };

            using (var sySession = new MasSession(homePath))
            {
                sySession.InitSession(sessionLogon);

                using (var arCustomer = sySession.CreateObject<IMasBusinessObject>("AR_Customer_bus", "AR_Customer_ui", "A/R"))
                {
                    arCustomer.SetKeyValue(AR.DivColumn, "01");
                    arCustomer.SetKeyValue(AR.CustomerColumn, "BOITEST");
                    arCustomer.SetKey();

                    arCustomer.SetValue("SalesPersonDivisionNo$", "01");
                    arCustomer.SetValue("SalesPersonNo$", "0100");

                    if (!arCustomer.Write()) { Console.WriteLine($"New customer not created. {arCustomer.LastErrorMessage}"); }

                    arCustomer.SetKeyValue(AR.DivColumn, "01");
                    arCustomer.SetKeyValue(AR.CustomerColumn, "BOITEST");
                    arCustomer.SetKey();

                    if (!arCustomer.Delete()) { Console.WriteLine($"The customer delete failed. {arCustomer.LastErrorMessage}"); }
                }
            }
        }
    }
}

Thank you!

Excellent thanks! I've been getting along with BOI, it's just very verbose in c#. I think I see enough of the intended implementation of the nuget to see the philosophy.  Is there any documentation for the nuget outside of the xml? I haven't found it.  

I am trying to use this library wrapper and can't see how I can initialize and/or insert lines for a sales order. Below is the code I have - after initiating the session.I am not sure if the lines object are within the salesorder (header) object or I should initialize a "lines" object.

Any help would be greatly appreciated.  

Is there documentation for this library?

Using sySession = New MasSession(homePath)
sySession.InitSession(sessionLogon)

Using sorder = sySession.CreateObject(Of IMasBusinessObject)("SO_SalesOrder_bus", "SO_SalesOrder_ui", "S/O")
sorder.SetValue("SalesOrderNo$", "TEST01")
sorder.SetValue("ARDivisionNo$", "01")
sorder.SetValue("CustomerNo$", "ABF")
sorder.SetValue("OrderDate$", "04152024")
sorder.SetValue("ItemCode$", "1001-HON-H252")

sorder.SetKey()

'??Should I do the sordeline below?

'Using sorderline = sySession.CreateObject(Of IMasBusinessObject)("SO_SalesOrderLines_bus", "SO_SalesOrderLines_ui", "S/O")
' sorderline.SetValue("ItemCode$", "1001-HON-H252")
' sorderline.SetValue("QuantityOrdered$", "1.00")
' sorderline.SetValue("WarehouseCode$", "001")
' sorderline.SetKey()
'End Using

If not sorder.Write() Then
   Console.WriteLine($"New Order not created. {sorder.LastErrorMessage}")
End If
End Using
End Using