如何检索和更新服务的azure配置文件

我对Azure完全陌生。我希望能够检索服务配置文件，然后更改其中的值。我一开始就被卡住了，因为我不知道如何在检索到配置文件时编辑它，也不知道必须将其设置为什么类型（XMLDocument等）才能编辑它。当我检索服务属性时，它返回以下XML

<?xml version="1.0" encoding="utf-8"?>
<HostedService xmlns="http://schemas.microsoft.com/windowsazure">
  <Url>hosted-service-url</Url>
  <ServiceName>hosted-service-name</ServiceName>
  <HostedServiceProperties>
    <Description>description</Description>
    <Location>location</Location>
    <AffinityGroup>affinity-group</AffinityGroup>
    <Label>base-64-encoded-name-of-the-service</Label>
  </HostedServiceProperties>
  <Deployments>
    <Deployment>
      <Name>deployment-name</Name>
      <DeploymentSlot>deployment-slot</DeploymentSlot>
      <PrivateID>deployment-id</PrivateID>
      <Status>deployment-status</Status>
      <Label>base64-encoded-deployment-label</Label>
      <Url>deployment-url</Url>
      <Configuration>base-64-encoded-configuration-file</Configuration>
      <RoleInstanceList>
        <RoleInstance>
          <RoleName>role-name</RoleName>
          <InstanceName>role-instance-name</InstanceName>
          <InstanceStatus>instance-status</InstanceStatus>
        </RoleInstance>
      </RoleInstanceList>
      <UpgradeDomainCount>upgrade-domain-count</UpgradeDomainCount>
      <RoleList>
        <Role>
          <RoleName>role-name</RoleName>
          <OsVersion>operating-system-version</OsVersion>
        </Role>
      </RoleList>
      <SdkVersion>sdk-version-used-to-create-package</SdkVersion>
      <InputEndpointList>
         <InputEndpoint>
            <RoleName>role-name</RoleName>
            <Vip>virtual-ip-address</Vip>
            <Port>port-number</Port>
         </InputEndpoint>
         …
      </InputEndpointList>
      <Locked>deployment-write-allowed-status</Locked>
      <RollbackAllowed>rollback-operation-allowed</RollbackAllowed>
    </Deployment>
  </Deployments>
</HostedService>

正如我所说，我想做的是从这个XML中获取"base-64-encoded-configuration-file"并编辑其值。但是我不知道如何从上面的XML中提取配置文件。

任何帮助，甚至是正确方向上的一点，都将不胜感激，干杯。