C# DateTime from Month and Year

Hello all,

I have the following,  Month Abbreviation such as Jan and Year such as 2015 in a string "Jan 2015".   I need to take that and get the 1st and last day of that month into two datetime variables.  

I got the month abbreviation using:

DateTimeFormatInfo mfi = new DateTimeFormatInfo();
mfi.GetAbbreviatedMonthName(1) as an example.

I guess I need to parse the numeric and string portion to do this?   So in the above case Jan 2015 I would want two datetime variables as:

DateTime startDate = 1/12015
DateTime endDate = 1/31/2015