ToStringUsDigitsFormattingInternal.cs

private static string ToStringUsDigitsFormattingInternal<T>(
    T number,
    DigitsFormattingSettings digitsFormattingSettings = DigitsFormattingSettings.None,
    int precesion = 2)
    where T : struct,
                IComparable,
                IComparable<T>,
                IConvertible,
                IEquatable<T>,
                IFormattable
{
    string formattedDigits = string.Empty;
    string currentNoComaFormatSpecifier = string.Concat("#.", new string('0', precesion));
    string currentComaFormatSpecifier = string.Concat("##,#.", new string('0', precesion));
    formattedDigits =
                        digitsFormattingSettings.HasFlag(DigitsFormattingSettings.NoComma) ? number.ToString(currentNoComaFormatSpecifier, usCultureInfo) :
                        number.ToString(currentComaFormatSpecifier, usCultureInfo);
    if (digitsFormattingSettings.HasFlag(DigitsFormattingSettings.PrefixDollar))
    {
        formattedDigits = string.Concat("$", formattedDigits);
    }
    if (digitsFormattingSettings.HasFlag(DigitsFormattingSettings.PrefixMinus))
    {
        formattedDigits = string.Concat("-", formattedDigits);
    }
    if (digitsFormattingSettings.HasFlag(DigitsFormattingSettings.SufixDollar))
    {
        formattedDigits = string.Concat(formattedDigits, "$");
    }

    return formattedDigits;
}