IfcDoc.FormEdit.UpdateTreeValidationNode C# (CSharp) Method

        private void UpdateTreeValidationNode(TreeNode tn)
        {
            if (tn.Tag is DocTemplateDefinition)
            {
            #if true
                DocTemplateDefinition dtd = (DocTemplateDefinition)tn.Tag;
                if (dtd.Validation == null)
                {
                    tn.BackColor = Color.Empty;
                }
                else if(dtd.Validation.Value)
                {
                    tn.BackColor = Color.Lime;
                }
                else
                {
                    tn.BackColor = Color.Red;
                }
            #endif
            }
            else if (tn.Tag is DocTemplateUsage)
            {
                DocTemplateUsage docUsage = (DocTemplateUsage)tn.Tag;
                if (docUsage.Validation != null)
                {
                    TreeNode tnTest = tn.Parent;
                    while (tnTest.Tag is DocTemplateUsage)
                    {
                        tnTest = tnTest.Parent;
                    }
                    bool alltrue = true;
                    DocEntity docEntity = (DocEntity)tnTest.Parent.Tag;
                    DocSchema docSchema = this.m_project.GetSchemaOfDefinition(docEntity);

                    if (docUsage.Definition.Name.Contains("053") && docEntity.Name.Equals("IfcWall"))
                    {
                        this.ToString();
                    }

                    if (docSchema != null && this.m_formatTest != null)
                    {
                        string typename = docSchema.Name + "." + docEntity.Name;
                        Type typeFilter = this.m_assembly.GetType(typename);
                        if (typeFilter != null)
                        {
                            foreach (SEntity entity in this.m_formatTest.Instances.Values)
                            {
                                if (typeFilter.IsInstanceOfType(entity))
                                {
                                    bool? result = docUsage.GetResultForObject(entity);
                                    if (result != null && !result.Value)
                                    {
                                        alltrue = false;
                                        break;
                                    }
                                }
                            }
                        }

                    }

                    if (alltrue)
                    {
                        tn.BackColor = Color.Lime;
                    }
                    else
                    {
                        tn.BackColor = Color.Red;
                    }
                }
                else
                {
                    tn.BackColor = Color.Empty;
                }
            #if false
                if (dtd.Validation == null)
                {
                    tn.BackColor = Color.Empty;
                }
                else if (dtd.Validation.Value)
                {
                    tn.BackColor = Color.Lime;
                }
                else
                {
                    tn.BackColor = Color.Red;
                }
            #endif
            }

            foreach (TreeNode sub in tn.Nodes)
            {
                UpdateTreeValidationNode(sub);
            }
        }