Gets or sets a one-dimensional string array that contains the culture-specific abbreviated names of the months.
Assembly: mscorlib (in mscorlib.dll)
Property ValueType: System.String 
A one-dimensional string array with 13 elements that contains the culture-specific abbreviated names of the months. For 12-month calendars, the 13th element of the array is an empty string. The array for InvariantInfo contains "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", and "".
An attempt was made to set the property to null.
An attempt was made to set the property to a multidimensional array or to a single-dimensional array with a length that is not exactly 13.
The DateTimeFormatInfo object is read-only.
If you set this property, the array must be one-dimensional with exactly 13 elements. Calendar objects accommodate calendars with 13 months. For 12-month calendars, the thirteenth element of the array should be set to String.Empty.
If you set the property, you must also set the AbbreviatedMonthGenitiveNames property.
The and AbbreviatedMonthGenitiveNames properties are used to format dates using the following format strings:
A standard date and time format string that aliases a custom format string that includes the "MMM" format specifier.
A custom date and time format string that includes the "MMM" format specifier.