尝试做更友好的解决方案DecimalToString (https://stackoverflow.com/a/34486763/3852139):

private static decimal Trim(this decimal value)
{
    var s = value.ToString(CultureInfo.InvariantCulture);
    return s.Contains(CultureInfo.InvariantCulture.NumberFormat.NumberDecimalSeparator)
        ? Decimal.Parse(s.TrimEnd('0'), CultureInfo.InvariantCulture)
        : value;
}

private static decimal? Trim(this decimal? value)
{
    return value.HasValue ? (decimal?) value.Value.Trim() : null;
}

private static void Main(string[] args)
{
    Console.WriteLine("=>{0}", 1.0000m.Trim());
    Console.WriteLine("=>{0}", 1.000000023000m.Trim());
    Console.WriteLine("=>{0}", ((decimal?) 1.000000023000m).Trim());
    Console.WriteLine("=>{0}", ((decimal?) null).Trim());
}

输出:

=>1
=>1.000000023
=>1.000000023
=>

你可以设置为:

decimal decNumber = 23.45600000m;
Console.WriteLine(decNumber.ToString("0.##"));

我从http://dobrzanski.net/2009/05/14/c-decimaltostring-and-how-to-get-rid-of-trailing-zeros/上找到了一个优雅的解决方案

基本上

decimal v=2.4200M;

v.ToString("#.######"); // Will return 2.42. The number of # is how many decimal digits you support.

要从字符串变量dateTicks中删除后面的零，请使用

返回新的字符串（dateTicks.Take（dateTicks.LastIndexOf（dateTicks.Last（v => v ！= '0'）） + 1）。ToArray（））;

这很简单。

decimal decNumber = Convert.ToDecimal(value);
        return decNumber.ToString("0.####");

测试。

欢呼:)

如果你想保持十进制数，试试下面的例子:

number = Math.Floor(number * 100000000) / 100000000;