I have tried to use <span style="font-family: 'Segoe UI'; color:gray; font-size: 12">Forename</span> but I do not believe the font is being applied. I use this style when the row is selected within a WinForms RadGridView. If the row is not selected (as a test) I have the same HTML markup without the font-family style and a different font is loaded (not sure which).
The screenshot shows the highlighted row in purple. Notice the lower curl of the g and y is present - whereas on the unselected rows - these letters have that part missing.
Note: The rendering of the grid take a very long time - as if it is failing to render rows with this font and so falls back to a default
Could you explain the problem?