how to show Bold text inside tooltip text in windows form tooltip control?

Question

I want to show some part in my tooltip text as bold.

i am doing this

string toolTipText = "tooltip text <b> Text to be in bold </b> rest of tooltip text.";
this.toolTip1.SetToolTip(this.linkLabel1, toolTipText);

in the above code i want the text inside and tags should come in bold.

Thanks in advance....