Set event bacground image without repeating

OK I used "no-repeat" in e.BackgroundRepeat, but how can I place my image in bottom left/right corner?

You can use an active area (https://doc.daypilot.org/scheduler/event-active-areas/) to place a custom rectangle the the specified position. Like this:

e.Areas.Add(new Area().Bottom(0).Left(0).Width(15).Height(15).Html("<img src='yourimage.png' />").Visible();

You can also use a CSS class instead:

e.Areas.Add(new Area().Bottom(0).Left(0).Width(15).Height(15).CssClass("bg-yourimage").Visible();

Just note that the active areas are placed above the event content.

Tried
e.Areas.Add(new Area().Bottom(0).Left(0).Width(15).Height(15).Html("<img src='/Content/images/cash.png'").Visible());
But nothing is visible. Also tried src='~/Content/images/cash.png'", src='Content/images/cash.png'", src=\"/Content/images/cash.png\""

It looks like the tag isn't closed properly (missing '>'). Try this:

e.Areas.Add(new Area().Bottom(0).Left(0).Width(15).Height(15).Html("<img src='yourimage.png' />").Visible();

Ah, right, we both forgot that. Now it works.

Great, thanks for the update. I've fixed it in my answer above as well.