A dynamic Rehosted Workflow Designer for WF 4

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Selen.WorkflowDesigner.Contracts;
using System.Diagnostics;
using RehostedDesigner.ToolboxModule.Contracts;
using Selen.WorkflowDesigner.Storage.Contracts;

namespace Selen.WorkflowTypeManagementModule.ViewModels
{
    public class ReloadToolbox
    {
        private IToolboxViewModel toolboxViewModel;
        private IMainViewModel mainViewModel;

        public ReloadToolbox(IMainViewModel mainViewModel, IToolboxViewModel toolboxViewModel)
        {
            this.toolboxViewModel = toolboxViewModel;
            this.mainViewModel = mainViewModel;
        }

        public bool LoadToolbox(IWorkflowType type)
        {
            try
            {
                this.toolboxViewModel.ReloadToolboxIcons(type.ToolboxCreatorService);

                return true;
            }
            catch (ApplicationException apEx)
            {
                this.mainViewModel.On_DisplayErrors(new DesignerErrorDefinition[] { new DesignerErrorDefinition() { ErrorMessage = "Toolbox error: " + apEx.Message } });
                Trace.TraceError(apEx.ToString());

                return false;
            }
            catch (Exception ex)
            {
                this.mainViewModel.On_DisplayErrors(new DesignerErrorDefinition[] { new DesignerErrorDefinition() { ErrorMessage = "Toolbox error: internal error" } });
                Trace.TraceError(ex.ToString());

                return false;
            }
        }
    }
}