Turn C# time to ruby Time

turnCSharpTimeToRubyTime.rb

def turnCSharpTimeToRubyTime(sourceTime)
  reg=/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})\.(\d{7})/
  temp,year,month,day,hour,minute,second,nsec=reg.match(sourceTime).to_a 
	return [year,month,day,hour,minute,second,nsec].map{|x| x.to_i}
end

# C# time String
timeStr="2011-08-11T11:17:55.7707133+08:00"

arr=turnCSharpTimeToRubyTime(timeStr)
# so ugly... but it works!
resultTime=Time.mktime(arr[0],arr[1],arr[2],arr[3],arr[4],arr[5],arr[6].div(1000))
# Is the result correct?
puts resultTime
# I need nanosecond
puts resultTime.nsec