C#中如何格式化string類型的金額

/// <summary>  
/// 根據精度將金額轉換為自定義類型的string  
/// </summary>  
/// <param name="precision">需要的精度</param>  
/// <param name="money">需要轉換的金額</param>  
/// <returns>轉換後的金額</returns>  
public  string FormateString(int precision, double money)  
{  
    //比如，FormateString(2,2333)==>結果：2,333.00  
    string format = "###,###,###,##0.";  
    for (int i = 0; i < precision; i++)  
    {  
        format = format + "0";  
    }  
    return money.ToString(format);  
}  
/// <summary>  
/// 轉換任意類型的對象為Double  
/// </summary>  
/// <param name="val">需要轉換的對象</param>  
/// <returns>返回Double類型的變量</returns>  
public  double ConvertDouble(object val)  
{  
    if (((val == null) || (val.ToString() == "")) || (val is DBNull))  
    {  
        return 0.0;  
    }  
    if (val is string)  
    {  
        val = val.ToString().Replace(",", "");  
    }  
    try
    {  
        return Convert.ToDouble(val);  
    }  
    catch
    {  
        return 0.0;  
    }  
}

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