How to convert 1234.5678 into 1234.56 in C#?

I am trying to use

        double abc = 1234.5678;
        Console.WriteLine(abc.ToString("N2"));
        Console.ReadKey(开发者_开发技巧);

but that is yielding

1.234,57

instead of

1234.56

How can I accomplish this?

Specify the invariant culture for formatting:

Console.WriteLine(abc.ToString("N2", CultureInfo.InvariantCulture));

It's still going to round it up to 1,234.57 though. It's printing the comma now because you've explicitly said you want the "N" format which includes thousands separators.

If you use "F2" it will give "1234.57":

Console.WriteLine(abc.ToString("F2", CultureInfo.InvariantCulture));

I'm not sure the best way to stop it from rounding up...

try this

    double abc = 1234.5678; 
    Console.WriteLine("{0}", Math.Floor(abc*100)/100 ); 
    Console.ReadKey(); 

// 1234.56

or make your own Floor() function

    public double Floor(double value, int digits)
    {
        double n = Math.Pow(10, digits);
        return Math.Floor(value * n) / n;
    }

You can use Math.Round like this:

double abc = 1234.5678;
double rounded = Math.Round(abc, 2);
Console.WriteLine(rounded);

And it will output only two fractional digits.