ADF v2进程管道中的取消

我可以使用以下命令获得管道列表,但找不到取消InProgress管道的选项。如何取消正在进行的管道?

var pf = new PipelineRunFilterParameters();
            pf.LastUpdatedAfter = DateTime.Now.AddDays(-20);
            pf.LastUpdatedBefore = DateTime.Now.AddDays(2);

            var pr = client.PipelineRuns.QueryByFactory(resourceGroup, dataFactoryName,pf);
            foreach(var r in pr.Value)
            {
                Console.WriteLine(r.PipelineName + " ... " + r.Status);

                if (r.Status == "InProgress")
                   //How do i Cancel this pipeline ?   

            }