，关于XML里面元素的提取，用C _XML/SOAP

求救，关于XML里面元素的提取，用C#
这个是我的XML文件代码：

<?xml version="1.0" encoding="utf-8"?>
<ConversationTransitions>
<Transition>
<SourceInteraction href="OP1"/>
</Transition>
<Transition>
<SourceInteraction href="OP2"/>
</Transition>
<Transition>
<SourceInteraction href="OP3"/>
</Transition>
<Transition>
<SourceInteraction href="OP4"/>
</Transition>
</ConversationTransitions>

我想把OP1,OP2,OP3,OP4都取出来，这个该怎么样操作啊？谢谢了啊，我想要具体的代码。

------解决方案--------------------

C# code


public void MainOption()
    {
        string xmlFilePath = @"xmlfilePath.xml"; //filePath
        List<string> opList = new List<string>();
        opList = GetOPValues(xmlFilePath);
    }

    private List<string> GetOPValues(string xmlFilePath)
    {
        List<string> opList = new List<string>();
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(xmlFilePath);

        XmlElement xmlRoot = xmlDoc.DocumentElement;
        XmlNodeList nodeList = xmlDoc.SelectNodes("ConversationTransitions/Transition/SourceInteraction");
        foreach (XmlNode node in nodeList)
        {
            opList.Add(node.Attributes["href"].Value);
        }
        return opList;
    }