private class SumString
{
   public string begin { get; set; }
   public string end { get; set; }
   public string text { get; set; }
}

List<String> beginAttribute = new List<String>();//开始时间
List<String> endAttribute = new List<String>();//结束时间
List<String> text = new List<string>();//节点文本类容

#region 注册GB2312
EncodingProvider provider = CodePagesEncodingProvider.Instance;
Encoding.RegisterProvider(provider);
Encoding gb2312 = Encoding.GetEncoding("gb2312");
#endregion

#region 注册GB2312
EncodingProvider provider = CodePagesEncodingProvider.Instance;
Encoding.RegisterProvider( provider );
Encoding gb2312 = Encoding.GetEncoding( "gb2312" );
#endregion

var content = File.ReadAllText( path, gb2312 );

byte[]	tempG	= gb2312.GetBytes( content );
byte[]	utf8	= Encoding.Convert( gb2312, Encoding.UTF8, tempG );
string	utf8str = Encoding.UTF8.GetString( utf8 );


XmlDocument document = new XmlDocument();
document.LoadXml( utf8str );
var templist = document.GetElementsByTagName( "p" );
foreach ( XmlNode p in templist )
{
	beginAttribute.Add( p.Attributes["begin"].Value );
	endAttribute.Add( p.Attributes["end"].Value );
	text.Add( p.InnerText.Trim() );
}