How to add google chart api data asp.net?

i want to create created a graph with the help of google chart api and I have a problem with correct display name of the month on the chart
this is code in controller looks like:

public ActionResult ListOrder()
{
var result = from s in db.Orders.ToList()
group s by
new { Year = s.dateCreated.Year, Month = s.dateCreated.Month, Day = 1 }
into g
select new OrderViewModel
{
dateCreated = new DateTime(g.Key.Year, g.Key.Month, g.Key.Day),
TotalPrice = g.Sum(x => x.totalPrice)
};
return Json(result, JsonRequestBehavior.AllowGet);

// change column data type to 'date'
data.addColumn('date', 'Month');
data.addColumn('number', 'Total sum order for month');

for (var i = 0; i < chartData.length; i++) {
var rowDate;

// convert dateCreated
rowDate = chartData[i].dateCreated;

// replace first forward slash (/) with 'new'
rowDate = rowDate.replace('/', 'new ');

// remove second forward slash (/)
rowDate = rowDate.replace('/', '');

// evaluate the string to an actual date
rowDate = eval(rowDate);

data.addRow([rowDate, chartData[i].TotalPrice]);
}