Best way to display decimal without trailing zeroes

Is there a display formatter that will output decimals as these string representations in c# without doing any rounding?

// decimal -> string

20 -> 20
20.00 -> 20
20.5 -> 20.5
20.5000 -> 20.5
20.125 -> 20.125
20.12500 -> 20.125
0.000 -> 0

{0.#} will round, and using some Trim type function will not work with a bound numeric column in a grid.

Do you have a maximum number of decimal places you'll ever need to display? (Your examples have a max of 5).

If so, I would think that formatting with "0.#####" would do what you want.

    static void Main(string[] args)
    {
        var dList = new decimal[] { 20, 20.00m, 20.5m, 20.5000m, 20.125m, 20.12500m, 0.000m };

        foreach (var d in dList)
            Console.WriteLine(d.ToString("0.#####"));
    }

I just learned how to properly use the G format specifier. See the MSDN Documentation. There is a note a little way down that states that trailing zeros will be preserved for decimal types when no precision is specified. Why they would do this I do not know, but specifying the maximum number of digits for our precision should fix that problem. So for formatting decimals, G29 is the best bet.

decimal test = 20.5000m;
test.ToString("G"); // outputs 20.5000 like the documentation says it should
test.ToString("G29"); // outputs 20.5 which is exactly what we want