WPF Binding - StringFormat - Not Formatting

Question

I have a ToolTip with a value set as:

Value=\"{Binding Path=DataItem.EquitySold, StringFormat=Reserved (Equity Share: \\{0\\}%)}\"

The tool

Answer 1

<Button.ToolTip>
 <TextBlock Text="{Binding Path=ToggleText, StringFormat={}{0} Text}"/>
</Button.ToolTip>

Button inside DataGridTemplateColumn