linq to xml问题

请问下下面的xml结构我要用linq语法删除VersionId为20100804的整个WorkFlowDefine，该怎么写。
<VerDefineList>
  <WorkFlowDefine>
    <VersionId>20100804</VersionId>
    <DefineId>beb65c14-2bb7-41b5-b563-b2fa6a603472</DefineId>
    <DefineName>测试工作流</DefineName>
    <DefineNote>测试</DefineNote>
    <WhetherSystem>false</WhetherSystem>
    <SystemCode>DTSC</SystemCode>
    <WebServiceUrl>111</WebServiceUrl>
    <WarningList />
    <Warning>
      <WarningId>db36274b-351d-41a3-ae77-060415aa20f2</WarningId>
      <WarningTitle>测试预警</WarningTitle>
      <WarningType>Ahead</WarningType>
      <WarningConditionPcnt>100</WarningConditionPcnt>
      <WarningConditionTime>90</WarningConditionTime>
      <WarningContent>今天下午两天准时开会</WarningContent>
      <ModuleCode>AA</ModuleCode>
      <PageUrl>url</PageUrl>
      <SendPerson>OperatorPeople</SendPerson>
    </Warning>
  </WorkFlowDefine>
  <WorkFlowDefine>
    <VersionId>20100805</VersionId>
    <DefineId>f14fcbcd-2817-4914-a648-c6de110c3730</DefineId>
    <DefineName>测试工作流</DefineName>
    <DefineNote>测试</DefineNote>
    <WhetherSystem>false</WhetherSystem>
    <SystemCode>DTSC</SystemCode>
    <WebServiceUrl>url</WebServiceUrl>
    <WarningList />
    <Warning>
      <WarningId>ffc1c3da-0c2d-47ce-9d27-cb619980f0e0</WarningId>
      <WarningTitle>测试预警</WarningTitle>
      <WarningType>Ahead</WarningType>
      <WarningConditionPcnt>100</WarningConditionPcnt>
      <WarningConditionTime>90</WarningConditionTime>
      <WarningContent>今天下午两天准时开会</WarningContent>
      <ModuleCode>spcmsMeet</ModuleCode>
      <PageUrl>url</PageUrl>
      <SendPerson>OperatorPeople</SendPerson>
    </Warning>
  </WorkFlowDefine>
  <WorkFlowDefine>
    <VersionId>20100806</VersionId>
    <DefineId>5583297e-fa67-4927-8f4b-340040106862</DefineId>
    <DefineName>测试工作流</DefineName>
    <DefineNote>测试</DefineNote>
    <WhetherSystem>false</WhetherSystem>
    <SystemCode>DTSC</SystemCode>
    <WebServiceUrl>url</WebServiceUrl>
    <WarningList />
    <Warning>
      <WarningId>8cda8de9-9f64-47b7-817e-d5325eb4b77d</WarningId>
      <WarningTitle>测试预警</WarningTitle>
      <WarningType>Ahead</WarningType>
      <WarningConditionPcnt>100</WarningConditionPcnt>
      <WarningConditionTime>90</WarningConditionTime>
      <WarningContent>今天下午两天准时开会</WarningContent>
      <ModuleCode>spcmsMeet</ModuleCode>
      <PageUrl>url</PageUrl>
      <SendPerson>OperatorPeople</SendPerson>
    </Warning>
  </WorkFlowDefine>
</VerDefineList>