How to Unlock the locked record and how to continue windows workflow activity in asp.net

WorkflowApplication app = new WorkflowApplication(new InsuredMemberWorkFlow.CreatePatient());


                AutoResetEvent instanceUnloaded = new AutoResetEvent(false);
 
                InstanceStore store =
                    new SqlWorkflowInstanceStore(ConfigurationManager.ConnectionStrings["workflowDB"].ConnectionString);
                InstanceHandle handle = store.CreateInstanceHandle();
                var deleteOwnerCmd = new DeleteWorkflowOwnerCommand();
                handle.Free();
                app.InstanceStore = store;
                app.PersistableIdle = (e) =>
                    {

                        return PersistableIdleAction.Unload;

                    };
                app.Idle = (e) =>
                    {

                        instanceUnloaded.Set();

                    };
                app.Unloaded = (e) =>
                    {
                        instanceUnloaded.Set();
                    };
                app.Completed = (e) =>
                    {
                        // ShowHideButtons();
                    };

                //Tracking Code
                var fileTrackingProfile = new TrackingProfile();
                fileTrackingProfile.Queries.Add(new WorkflowInstanceQuery
                    {
                        States = { "*" }
                    });
                fileTrackingProfile.Queries.Add(new ActivityStateQuery()
                    {
                        ActivityName = "*",
                        States = { "*" },
                        Variables = { "*" }

                    });
                fileTrackingProfile.Queries.Add(new CustomTrackingQuery()
                    {
                        ActivityName = "*",
                        Name = "*"
                    });

                var fileTrackingParticipant = new FileTrackingParticipant { TrackingProfile = fileTrackingProfile };
                app.Extensions.Add(fileTrackingParticipant);

                //---End Tracking code
                if (objPatient.WorkFlowId == Guid.Empty)
                {
                    id = app.Id;
                    // Run the workflow.
                    app.Run();
                    objPatient.WorkFlowId = app.Id;
                    app.ResumeBookmark("SubmitClaimBookmark", objPatient);
                    Session["Action"] = "SC";
                }
                else if (objPatient.WorkFlowId != null)
                {
                    app.Load(objPatient.WorkFlowId);
                    if (objPatient.NextAction == "Submit Claim")
                    {

                        app.ResumeBookmark("SubmitClaimBookmark", objPatient);

                        Session["Action"] = "SC";
                    }
                    else if (objPatient.NextAction == "Verify Claim")
                    {
                        app.ResumeBookmark("VerifyClaimBookmark", objPatient);
                        Session["Action"] = "VC";
                    }
                   
                   
                instanceUnloaded.WaitOne();
                // Wait for the workflow to go idle before gathering
                // the user's input.
                string AC = Session["Action"].ToString();

            }

        }