Simplify delete relationship snippet (#12717)

* simplify delete relationship snippet
Azure · Jul 8, 2020 · 43df8aa · 43df8aa
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diff --git a/...italtwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/RelationshipSamples.cs b/...italtwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/RelationshipSamples.cs
@@ -178,27 +178,18 @@ public async Task RunSamplesAsync(DigitalTwinsClient client)
 
             #endregion Snippet:DigitalTwinsSampleGetIncomingRelationships
 
-            #region Snippet:DigitalTwinsSampleDeleteAllRelationships
+            // Delete the contains relationship, created earlier in the sample code, from building to floor.
+
+            #region Snippet:DigitalTwinsSampleDeleteRelationship
 
-            // Delete all relationships from building to floor. These relationships were created using the BasicRelationship type.
-            AsyncPageable<string> buildingRelationshipsToDelete = client.GetRelationshipsAsync("buildingTwinId");
-            await foreach (var relationshipToDelete in buildingRelationshipsToDelete)
-            {
-                BasicRelationship relationship = JsonSerializer.Deserialize<BasicRelationship>(relationshipToDelete);
-                Response deleteRelationshipResponse = await client.DeleteRelationshipAsync(relationship.SourceId, relationship.Id);
-                Console.WriteLine($"Deleted relationship with Id {relationship.Id}. Status response: {deleteRelationshipResponse.Status}.");
-            }
+            Response deleteBuildingRelationshipResponse = await client.DeleteRelationshipAsync("buildingTwinId", "buildingFloorRelationshipId");
+            Console.WriteLine($"Deleted relationship with Id buildingFloorRelationshipId. Status response: {deleteBuildingRelationshipResponse.Status}.");
 
-            // Delete all relationships from floor to building. These relationships were created using the CustomRelationship type.
-            AsyncPageable<string> floorRelationshipsToDelete = client.GetRelationshipsAsync("floorTwinId");
-            await foreach (var relationshipToDelete in floorRelationshipsToDelete)
-            {
-                CustomRelationship relationship = JsonSerializer.Deserialize<CustomRelationship>(relationshipToDelete);
-                Response deleteRelationshipResponse = await client.DeleteRelationshipAsync(relationship.SourceId, relationship.Id);
-                Console.WriteLine($"Deleted relationship with Id {relationship.Id}. Status response: {deleteRelationshipResponse.Status}.");
-            }
+            #endregion Snippet:DigitalTwinsSampleDeleteRelationship
 
-            #endregion Snippet:DigitalTwinsSampleDeleteAllRelationships
+            // Delete the containedIn relationship, created earlier in the sample code, from floor to building.
+            Response deleteFloorRelationshipResponse = await client.DeleteRelationshipAsync("floorTwinId", "floorBuildingRelationshipId");
+            Console.WriteLine($"Deleted relationship with Id floorBuildingRelationshipId. Status response: {deleteFloorRelationshipResponse.Status}.");
 
             // Clean up.
             try

diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/Readme.md b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/Readme.md
@@ -416,24 +416,9 @@ await foreach (IncomingRelationship incomingRelationship in incomingRelationship
 
 To delete all outgoing relationships for a digital twin, simply iterate over the relationships and delete them iteratively.
 
-```C# Snippet:DigitalTwinsSampleDeleteAllRelationships
-// Delete all relationships from building to floor. These relationships were created using the BasicRelationship type.
-AsyncPageable<string> buildingRelationshipsToDelete = client.GetRelationshipsAsync("buildingTwinId");
-await foreach (var relationshipToDelete in buildingRelationshipsToDelete)
-{
-    BasicRelationship relationship = JsonSerializer.Deserialize<BasicRelationship>(relationshipToDelete);
-    Response deleteRelationshipResponse = await client.DeleteRelationshipAsync(relationship.SourceId, relationship.Id);
-    Console.WriteLine($"Deleted relationship with Id {relationship.Id}. Status response: {deleteRelationshipResponse.Status}.");
-}
-
-// Delete all relationships from floor to building. These relationships were created using the CustomRelationship type.
-AsyncPageable<string> floorRelationshipsToDelete = client.GetRelationshipsAsync("floorTwinId");
-await foreach (var relationshipToDelete in floorRelationshipsToDelete)
-{
-    CustomRelationship relationship = JsonSerializer.Deserialize<CustomRelationship>(relationshipToDelete);
-    Response deleteRelationshipResponse = await client.DeleteRelationshipAsync(relationship.SourceId, relationship.Id);
-    Console.WriteLine($"Deleted relationship with Id {relationship.Id}. Status response: {deleteRelationshipResponse.Status}.");
-}
+```C# Snippet:DigitalTwinsSampleDeleteRelationship
+Response deleteBuildingRelationshipResponse = await client.DeleteRelationshipAsync("buildingTwinId", "buildingFloorRelationshipId");
+Console.WriteLine($"Deleted relationship with Id buildingFloorRelationshipId. Status response: {deleteBuildingRelationshipResponse.Status}.");
 ```
 
 ## Create, list, and delete event routes of digital twins