如何将sumarry添加到方法

我有如下方法,

/// <summary>
/// Converts currency
/// </summary>
/// <param name="dtRawInput">Output of the procedure P_FETCH_CONV_CUR</param>
///<param name="FromCurrency">Three letter code of from currency  Ex: USD</param>
///<param name="ToCurrency">Three letter code of from currency  Ex: USD</param>
///<param name="FromAmount">From currency amount  Ex: USD</param>
///<param name="Type">N for normal conversion, F for fare round and T for tax round</param>
/// <exception cref="FormatException">Why it's thrown.</exception>       
public static string CurrencyConversion(DataTable dtRawInput, string FromCurrency, string ToCurrency, string FromAmount, string Type)
{
}

当我尝试访问这个方法时,它会在工具提示上显示摘要和参数定义。

但问题是

• 将此类转换为dll后,它不会显示任何内容。

请帮帮我