protected void Button1_Click(object sender, EventArgs e)
 {
     if (string.IsNullOrEmpty(txt_value.Text))
     {
         return;
     }
     else
     {
         string value = txt_value.Text.Trim();
         string newValue = StringConvert(value, "1");
         if (!string.IsNullOrEmpty(newValue))
         {
             TextArea1.Value = newValue;
         }
     }
 }
 protected void Button2_Click(object sender, EventArgs e)
 {
     if (string.IsNullOrEmpty(txt_value.Text))
     {
         return;
     }
     else
     {
         string value = txt_value.Text.Trim();
         string newValue = StringConvert(value, "2");
         if (!string.IsNullOrEmpty(newValue))
         {
             TextArea1.Value = newValue;
         }
     }
 }

 #region IString 成員

 public string StringConvert(string x, string type)
 {
     String value = String.Empty;
     switch (type)
     {
             value =  Microsoft.VisualBasic.Strings.StrConv(x, Microsoft.VisualBasic.VbStrConv.TraditionalChinese,0);
             break;
         case "2":
             value = Microsoft.VisualBasic.Strings.StrConv(x, Microsoft.VisualBasic.VbStrConv.SimplifiedChinese, 0);
             break;
         default:
             break;
     }
     return value;
 }

 #endregion
 

C#利用微軟自帶庫進行中文繁體和簡體之間的轉換的代碼