.net - number of Saturdays and Sundays of a specific year and month -

using visual basic .net, how can find number of saturdays , sundays of specific year , month?

i have created function uses calculation method calculate sats , sundays. have not tested death. have tested performance of both , calculation method (below) , iteration method in @p.campbell's answer, result in milliseconds 10,000 calls were.

calculation: 7 iteration: 39

hope helps.

dave

    dim month integer = 12     dim year integer = 2011      'calculate start , end of month     dim current new datetime(year, month, 1)     dim ending datetime = current.addmonths(1)      'ints hold results     dim numsat integer = 0     dim numsun integer = 0      'numbers used in calculation     dim datediff integer = (ending.date - current.date).days     dim firstday dayofweek = current.dayofweek      'figure out how many whole weeks in month, there must sat , sunday in each     ' note integer devision     numsat = datediff / 7     numsun = datediff / 7      'calculate using day of week 1st , how many days on full weeks there     ' note sunday requires bit sunday value 0 , saturday value 6     numsat += if((firstday + (datediff mod 7)) > (dayofweek.saturday), 1, 0)     numsun += if(((firstday + (datediff mod 7)) > (dayofweek.saturday + 1)) or (firstday = dayofweek.sunday , (datediff mod 7 = 1)), 1, 0)      'output results     console.writeline("sats: " & numsat)     console.writeline("suns: " & numsun)     console.readline()