Csharp 当双精度值有小数点时，双精度值被转换为字符串值

我试图使用CSVHelper库将数据写入MemoryStream，然后使用该MemoryStream生成CSV文件.

问题是，当双精度值有小数点时，双精度值会被转换成奇怪的字符串值.预期输出和奇怪输出位于底部.

有人知道如何克服这个问题吗？或者下面的代码有错误吗？

public class Foo
{
    public Foo()
    {
    }

    public double valOne { get; set; }

    public double valTwo { get; set; }
}

public class FooMap : ClassMap<Foo>
{
    public FooMap()
    {
        Map(m => m.valOne).Index(0).Name("Val One");
        Map(m => m.valTwo).Index(1).Name("Val Two");
    }
}

var records = new List<Foo> {
    new Foo{valOne = 3224.12, valTwo = 4122},
    new Foo{valOne = 2030.20, valTwo = 5555},
};

var config = new CsvConfiguration(CultureInfo.CurrentCulture) { Delimiter = ",", HasHeaderRecord = true };

using (var memoryStream = new MemoryStream())
using (var writer = new StreamWriter(memoryStream))
using (var csv = new CsvWriter(writer, config))
{
    csv.Context.RegisterClassMap<FooMap>();

    csv.WriteHeader<Foo>();

    csv.NextRecord();
    foreach (var record in records)
    {
        csv.WriteRecord(record);
        csv.NextRecord();
    }

    writer.Flush();
    
    var result = Encoding.UTF8.GetString(memoryStream.ToArray());

    byte[] bytes = Encoding.ASCII.GetBytes(result);

    return new FileContentResult(bytes, "text/csv")
    {
        FileDownloadName = "Sample_Report_Name"
    };
}

预期输出:

Val One, Val Two
3224.12,4122
2030.20,5555

奇怪的输出:

Val One, Val Two
"3224,12",4122
"2030,20",5555