Create the bubble object using the HTML helper:
<%=Html.DayPilotBubble("bubble", new DayPilotBubbleConfig{})%>
Note that the bubble init code should be placed above DayPilot Calendar control init code.
Add EventBubble property to the DayPilot Calendar config:
EventBubble="bubble"
Use the Bubble id as the EventBubble value.
<%=Html.DayPilotBubble("bubble", new DayPilotBubbleConfig{})%> <%=Html.DayPilotCalendar("dpc", new DayPilotCalendarConfig(Silver.Theme) { ... EventBubble = "bubble" })%>