DesignMode with Controls

System.ComponentModel.DesignMode property

System.ComponentModel.LicenseManager.UsageMode property

private string ServiceString()
{
    if (GetService(typeof(System.ComponentModel.Design.IDesignerHost)) != null)
        return "Present";
    else
        return "Not present";
}

public bool IsDesignerHosted
{
    get
    {
        Control ctrl = this;

        while(ctrl != null)
        {
            if((ctrl.Site != null) && ctrl.Site.DesignMode)
                return true;
            ctrl = ctrl.Parent;
        }
        return false;
    }
}
public static bool IsInDesignMode()
{
    return System.Reflection.Assembly.GetExecutingAssembly()
         .Location.Contains("VisualStudio"))
}

if (LicenseManager.UsageMode == LicenseUsageMode.Runtime)
{
  bla bla bla...
}

/// <summary>
/// The DesignMode property does not correctly tell you if
/// you are in design mode.  IsDesignerHosted is a corrected
/// version of that property.
/// (see https://connect.microsoft.com/VisualStudio/feedback/details/553305
/// and http://decav.com/blogs/andre/archive/2007/04/18/1078.aspx )
/// </summary>
public bool IsDesignerHosted
{
    get
    {
        Control ctrl = this;

        while (ctrl != null)
        {
            if ((ctrl.Site != null) && ctrl.Site.DesignMode)
                return true;
            ctrl = ctrl.Parent;
        }
        return false;
    }
}

public bool RealDesignMode()
  {
     if (Parent is MyBaseUserControl)
     {
        return (DesignMode ? true : (MyBaseUserControl) Parent.RealDesignMode;
     }

     return DesignMode;
  }

static bool IsDesignMode(Control control)
{
    PropertyInfo designModeProperty = typeof(Component).
      GetProperty("DesignMode", BindingFlags.Instance | BindingFlags.NonPublic);

    while (designModeProperty != null && control != null)
    {
        if((bool)designModeProperty.GetValue(control, null))
        {
            return true;
        }
        control = control.Parent;
    }
    return false;
}

public MyUserControl()
{
    InitializeComponent();
    m_IsInDesignMode = (LicenseManager.UsageMode == LicenseUsageMode.Designtime);
}

private bool m_IsInDesignMode = true;
public bool IsInDesignMode { get { return m_IsInDesignMode; } }

/// <summary>
    /// Gets a value indicating whether this instance is in design mode.
    /// </summary>
    /// <value>
    ///     <c>true</c> if this instance is in design mode; otherwise, <c>false</c>.
    /// </value>
    protected bool IsDesignMode
    {
        get { return DesignMode || LicenseManager.UsageMode == LicenseUsageMode.Designtime; }
    }