need to get Verification errors on property setters

Tim:

You can do this using a VerifierBatchInterceptor. See the section in the Validation Through Verification document (in the Learning Resources) entitled, "Monitor Execution with the VerifierBatchInterceptor".

Each setter will trigger a "batch" of verifier executions (since there can potentially be multiple verifiers triggered by setting any particular property). The interceptor will get called once for each, but has an EndOfBatch flag that gets set to true when a batch is complete.  (Running an instance verification also triggers a single batch of verifier executions.)

The VerifierContext parameter for the VerifierBatchInterceptor delegate will accumulate a collection of VerifierResults for each batch. So you can check in the interceptor to see when EndOfBatch = true, then process the collection of VerifierResults to populate your tree control.