How to use two parameter in Standard Numeric Format Strings

Question

Hi,

 

i have double variable (that contain amount in rupees)

Double d = 50000.65487;

 

Now i need this in below string format

50,000 (i mean with Group separators and removing removing . (.65487)).

CultureInfo ci = new CultureInfo("en-us");

 

lbl_interest.Text = d.ToString("F0", ci);

output -> 50000 (removed floating point)

lbl_interest.Text = d.ToString("N", ci);

output -> 50,000.65487 (With Grouping)

 

Now i want to make combination of both, so how can i ?