Determines the week in a month in which the event will occur. This field is only valid for recurrences of the "monthlyNth" and "yearlyNth" types and allows the definition of a recurrence pattern that is only valid for the Nth occurrence, such as "the 2nd Sunday in March" pattern. The default value is "first". Possible values are: first - the recurring event will occur on the specified day or days of the first week in the month. second - The recurring event will occur on the specified day or days of the second week in the month. third = - The recurring event will occur on the specified day or days of the third week in the month. fourth - The recurring event will occur on the specified day or days of the fourth week in the month. last - The recurring event will occur on the specified day or days of the last week in the month.

'Declaration
 
Public Property Instance As System.String

public System.string Instance {get; set;}