ModelHistory Class

[SerializableAttribute]
public static class ModelHistory

<SerializableAttribute>
Public NotInheritable Class ModelHistory

using Tekla.Structures.Model;
using Tekla.Structures.Model.History;
using System;
using System.Diagnostics;
using Tekla.Structures.Geometry3d;

public class Example1
{
    /// to be called before modifications
    private void Init()
    {
        ModelHistory.TakeModifications("Example1_ModStamp");
    }

    /// to be called when need to handle modifications
    private void Run_TakeModifications()
    {
        var Modifications = ModelHistory.TakeModifications("Example1_ModStamp");
        while (Modifications.Modified.MoveNext())
        {
            ModelObject mo = Modifications.Modified.Current;
            Console.WriteLine("Run_TakeModifications: Modified id: {0}", mo.Identifier.GUID);
        }
    }

    /// to be called when need to preview modifications without advancing modstamp
    private void Run_GetModifications()
    {
        var Modifications = ModelHistory.GetModifications("Example1_ModStamp");
        while (Modifications.Modified.MoveNext())
        {
            ModelObject mo = Modifications.Modified.Current;
            Console.WriteLine("Run_GetModifications: Modified id: {0}", mo.Identifier.GUID);
        }
    }

    /// this takes each modification only once
    public void ModificationProcessed()
    {
        this.Init();
        new Beam(new Point(), new Point(0, 0, 1000))
        {
            Name = "BEAM1",
            Profile = new Profile() { ProfileString = "HEA400" },
            Material = new Material() { MaterialString = "Steel_Undefined" }
        }.Insert();
        new Model().CommitChanges();
        this.Run_TakeModifications(); // prints BEAM1
        new Beam(new Point(), new Point(0, 0, 1000)) 
        {
            Name = "BEAM2",
            Profile = new Profile() { ProfileString = "HEA400" },
            Material = new Material() { MaterialString = "Steel_Undefined" }
        }.Insert();
        new Model().CommitChanges();
        this.Run_TakeModifications(); // prints BEAM2, but not BEAM1
    }

    /// this always returns all modifications since last TakeModifications()
    public void ModificationPreviewed()
    {
        this.Init();
        new Beam(new Point(), new Point(0, 0, 1000)) 
        {
            Name = "BEAM1",
            Profile = new Profile() { ProfileString = "HEA400" },
            Material = new Material() { MaterialString = "Steel_Undefined" }
        }.Insert();
        new Model().CommitChanges();
        this.Run_GetModifications(); // prints BEAM1
        new Beam(new Point(), new Point(0, 0, 1000)) 
        {
            Name = "BEAM2",
            Profile = new Profile() { ProfileString = "HEA400" },
            Material = new Material() { MaterialString = "Steel_Undefined" }
        }.Insert();
        new Model().CommitChanges();
        this.Run_GetModifications(); // prints both BEAM1 and BEAM2
    }
}