And I pass it as a "Control" to my main application.
It belongs to a panel in main application.

But when the form showing, the propertygrid had a little different:
all of it's head title and item's caption disappeared.
It had a terrible look.

Some of my code shown as follows:

public class DllTest
{
    PropertyGrid gridRight;
    ...........

    public override void CreateControl()
    {
       // Right
       gridRight = new System.Windows.Forms.PropertyGrid();
       gridRight.Location = new System.Drawing.Point(216, 0);

       // Create properties tab
       gridRight.CommandsVisibleIfAvailable = true;
       gridRight.LargeButtons = false;
       gridRight.LineColor = System.Drawing.SystemColors.ScrollBar;
       gridRight.Location = new System.Drawing.Point(16, 8);
       gridRight.Name = "propertyGrid1";
       gridRight.Size = new System.Drawing.Size(256, 248);
       gridRight.ViewBackColor = System.Drawing.SystemColors.Window;
       gridRight.ViewForeColor = System.Drawing.SystemColors.WindowText;

       gridRight.Text = "PropertyGrid";

       gridRight.Dock = System.Windows.Forms.DockStyle.Fill;
       gridRight.TabIndex = 1;

    }

    ............

    public override Control Right
    {
       get
       {
            return gridRight;
       }
    }

    ............

    private void treeViewLeft_Clicked(object sender, TreeViewCancelEventArgs
e)
    {
        if (null != e.Node.Tag)
            gridRight.SelectedObject = e.Node.Tag as BackupItem;
       else
            gridRight.SelectedObject = null;
    }

    ............

  private void LoadClientComponents()
  {
   middleBar = new Splitter();
   middleBar.Dock = DockStyle.Left;
   panelRight.Controls.Add(middleBar);

   intee.Initialize();                    // intee is an instance of DllTest
and is created in another place.
   intee.CreateControl();
   left = intee.Left;
   panelRight.Controls.Add(intee.Left);
   right = intee.Right;
   panelRight.Controls.Add(intee.Right);
  }

The caption is in the left edge, covered by other controls...