Issue with visual studio template & directory creation

To create solution at root level (not nest them in subfolder) you must create two templates:
1) ProjectGroup stub template with your wizard inside that will create new project at the end from your
2) Project template

use the following approach for that

1. Add template something like this

  <VSTemplate Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vstemplate/2005" Type="ProjectGroup">
    <TemplateData>
      <Name>X Application</Name>
      <Description>X Shell.</Description>
      <ProjectType>CSharp</ProjectType>
      <Icon>__TemplateIcon.ico</Icon>
    </TemplateData>
    <TemplateContent>
    </TemplateContent>
    <WizardExtension>
    <Assembly>XWizard, Version=1.0.0.0, Culture=neutral</Assembly>
    <FullClassName>XWizard.FixRootFolderWizard</FullClassName>
    </WizardExtension>  
  </VSTemplate>

2. Add code to wizard

// creates new project at root level instead of subfolder.
public class FixRootFolderWizard : IWizard
{
    #region Fields

    private string defaultDestinationFolder_;
    private string templatePath_;
    private string desiredNamespace_;

    #endregion

    #region Public Methods
    ...
    public void RunFinished()
    {
        AddXProject(
            defaultDestinationFolder_,
            templatePath_,
            desiredNamespace_);
    }

    public void RunStarted(object automationObject,
        Dictionary<string, string> replacementsDictionary,
        WizardRunKind runKind, object[] customParams)
    {
        defaultDestinationFolder_ = replacementsDictionary["$destinationdirectory$"];
        templatePath_ = 
            Path.Combine(
                Path.GetDirectoryName((string)customParams[0]),
                @"Template\XSubProjectTemplateWizard.vstemplate");

         desiredNamespace_ = replacementsDictionary["$safeprojectname$"];

         string error;
         if (!ValidateNamespace(desiredNamespace_, out error))
         {
             controller_.ShowError("Entered namespace is invalid: {0}", error);
             controller_.CancelWizard();
         }
     }

     public bool ShouldAddProjectItem(string filePath)
     {
         return true;
     }

     #endregion
 }

 public void AddXProject(
     string defaultDestinationFolder,
     string templatePath,
     string desiredNamespace)
 {
     var dte2 = (DTE) System.Runtime.InteropServices.Marshal.GetActiveObject("VisualStudio.DTE.10.0");
     var solution = (EnvDTE100.Solution4) dte2.Solution;

     string destinationPath =
         Path.Combine(
             Path.GetDirectoryName(defaultDestinationFolder),
             "X");

     solution.AddFromTemplate(
         templatePath,
         destinationPath,
         desiredNamespace,
         false);
     Directory.Delete(defaultDestinationFolder);
}