公共静态无效WriteElementContent（此XmlWriter的作家，字符串内容）
{
    如果（String.IsNullOrEmpty（内容））
    {
        返回;
    }

    // WriteString将愉快地逃过任何XML标记字符。然而，
    //为了便于阅读，我们编写一个包含某些特殊的内容
    //字符作为CDATA
    常量字符串specialChars中= @＆LT;＆GT;＆安培;;
    如果（content.IndexOfAny（SpecialChars.ToCharArray（））！=  -  1）
    {
        writer.WriteCData（内容）;
    }
    其他
    {
        writer.WriteString（内容）;
    }
}
 

I'm using XmlTextWriter class in my project. i don't know, how to use CDATA in Xml. Can anyone help me?

objX.WriteElementString("category", c.DeepestCategoryName);

As noted by others, use WriteCData if you want to write a CDATA section explicitly. Here is a general-purpose extension method that I use to write a CDATA element 'automatically' if the text contains certain characters:

public static void WriteElementContent(this XmlWriter writer, string content)
{
    if (String.IsNullOrEmpty(content))
    {
        return;
    }

    // WriteString will happily escape any XML markup characters. However, 
    // for legibility we write content that contains certain special
    // characters as CDATA 
    const string SpecialChars = @"<>&";
    if (content.IndexOfAny(SpecialChars.ToCharArray()) != -1)
    {
        writer.WriteCData(content);
    }
    else
    {
        writer.WriteString(content);
    }
}