xml 中如果包含部分 ascii 控制字符（小數字）則 chrome會報告如下類型錯我：

This page contains the following errors:
error on line 20 at column 89: Input is not proper UTF-8, indicate encoding !
Bytes: 0x08 0xE8 0xBA 0xB2
Below is a rendering of the page up to the first error.

解決辦法：replace 這些字符

 public static string ReplaceXMLInvaidChar(string xmlStr)
        {
           return Regex.Replace(xmlStr, "[\x00-\x1F\x7F]","");
           
        }

原因：XML 規範不支持如下字符

#x0 - #x8 (ASCII 0 - 8)
#xB - #xC (ASCII 11 - 12)
#xE - #x1F (ASCII 14 - 31)

參看文檔：https://support.microsoft.com/en-us/kb/315580

原文地址：https://blog.csdn.net/isaisai/article/details/53899089

Input is not proper UTF-8, indicate encoding !錯誤處理