c# – 查找Dynamics CRM实体属性的依赖项

像这样的代码：

var attributeRequest = new RetrieveAttributeRequest
{
    EntityLogicalName = "invoice",LogicalName = "billto_city"
};

var attributeResponse = (RetrieveAttributeResponse)proxy.Execute(attributeRequest);

var dependenciesRequest = new RetrieveDependenciesForDeleteRequest
{
    ObjectId = (Guid)attributeResponse.AttributeMetadata.MetadataId,ComponentType = (int)attributeResponse.AttributeMetadata.AttributeType
};

var dependenciesResponse = (RetrieveDependenciesForDeleteResponse)proxy.Execute(dependenciesRequest);

给出负面结果.我认为使用属性MetadataId作为ObjectId是不正确的.但似乎无法找到ObjectId属性.

以前有人面临类似的任务吗？你是怎么解决的？