如何正确的把简体中文翻译到繁体中文(C#)

/// <summary>
/// 必需的设计器变量。
/// </summary>
private Word.ApplicationClass app=new Word.ApplicationClass();

/// <summary>
/// 初始化Word 的Application 和Documents
/// </summary>
/// <returns></returns>

private void InitWordApp()

{

object optional=Missing.Value;
object template=Missing.Value;
object newTemplate=Missing.Value;
object documentType=Missing.Value;
object visible=false;
doc = app.Documents.Add(ref template, ref newTemplate, ref documentType, ref visible);

}

/// <summary>
/// 将繁体中文转换成简体中文
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private string ConvertToTCSC(string s)
{
if(s=="") return s;
object first=0;
object last=doc.Characters.Count;
doc.Range(ref first, ref last).Select();
doc.Range(ref first,ref last).Text=s;
last=doc.Characters.Count;
doc.Range(ref first,ref last).TCSCConverter(Word.WdTCSCConverterDirection.wdTCSCConverterDirectionTCSC,true,true);
last=doc.Characters.Count;
return doc.Range(ref first,ref last).Text.TrimEnd('/r');
}
/// <summary>
/// 将简体中文转换成繁体中文
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private string ConvertToSCTC(string s)
{
if(s=="") return "";
object first=0;
object last=doc.Characters.Count;
doc.Range(ref first, ref last).Select();
doc.Range(ref first,ref last).Text=s;
last=doc.Characters.Count;
doc.Range(ref first,ref last).TCSCConverter(Word.WdTCSCConverterDirection.wdTCSCConverterDirectionSCTC,true,true);
last=doc.Characters.Count;
return doc.Range(ref first,ref last).Text.TrimEnd('/r');
}