Update database docs

Author: docohe

articles/data-explorer/create-cluster-database-csharp.md

@@ -92,11 +92,15 @@ If the result contains `ProvisioningState` with the `Succeeded` value, then the
     var hotCachePeriod = new TimeSpan(3650, 0, 0, 0);
     var softDeletePeriod = new TimeSpan(3650, 0, 0, 0);
     var databaseName = "mykustodatabase";
-    var database = new Database(location: location, softDeletePeriod: softDeletePeriod, hotCachePeriod: hotCachePeriod);
+    var database = new ReadWriteDatabase(location: location, softDeletePeriod: softDeletePeriod, hotCachePeriod: hotCachePeriod);
 
     await kustoManagementClient.Databases.CreateOrUpdateAsync(resourceGroupName, clusterName, databaseName, database);
     ```
 
+        [!NOTE]
+        if you are using C# client of version 2.0.0 or below, please use "Database" object instead of "ReadWriteDatabase". 
+
+
    |**Setting** | **Suggested value** | **Field description**|
    |---|---|---|
    | clusterName | *mykustocluster* | The name of your cluster where the database will be created.|
@@ -108,7 +112,7 @@ If the result contains `ProvisioningState` with the `Succeeded` value, then the
 2. Run the following command to see the database that you created:
 
     ```csharp
-    kustoManagementClient.Databases.Get(resourceGroupName, clusterName, databaseName);
+    kustoManagementClient.Databases.Get(resourceGroupName, clusterName, databaseName) as ReadWriteDatabase;
     ```
 
 You now have a cluster and a database.

articles/data-explorer/create-cluster-database-python.md

@@ -105,14 +105,18 @@ If the result contains `provisioningState` with the `Succeeded` value, then the
 	databaseName="mykustodatabase"
 
 	database_operations = kusto_management_client.databases	
-	_database = Database(location=location,
+	_database = ReadWriteDatabase(location=location,
 						soft_delete_period=softDeletePeriod,
 						hot_cache_period=hotCachePeriod)
 
 	#Returns an instance of LROPoller, see https://docs.microsoft.com/python/api/msrest/msrest.polling.lropoller?view=azure-python
     poller =database_operations.create_or_update(resource_group_name = resource_group_name, cluster_name = clusterName, database_name = databaseName, parameters = _database)
     ```
 
+        [!NOTE]
+       if you are using python client of version 0.4.0 or below, please use "Database" object instead of "ReadWriteDatabase". 
+
+
    |**Setting** | **Suggested value** | **Field description**|
    |---|---|---|
    | cluster_name | *mykustocluster* | The name of your cluster where the database will be created.|