How to get new line inside radzen chart

lets say I have this

DataItem[] revenue2019 = new DataItem[] {
        new DataItem
        {
            Date = ("2019-01-01"),
            Revenue = 234000
        },
        new DataItem
        {
            Date = ("2019-02-01"),
            Revenue = 269000
        },
        new DataItem
        {
            Date = ("2019-03-01"),
            Revenue = 233000
        },

and I want to to get that.....

DataItem[] revenue2019 = new DataItem[] {
new DataItem
{
Date = ("2019-01-01") + /n + text
Revenue = 234000
},
new DataItem
{
Date = ("2019-02-01") + /n + text,
Revenue = 269000
},
new DataItem
{
Date = ("2019-03-01") + /n + text,
Revenue = 233000
},

but when I'm trying to print that ,new line is not executed...