<PackageReference Include="System.ClientModel" Version="1.1.0" />

ClientErrorBehaviors

public enum ClientErrorBehaviors
ClientErrorBehaviors controls the behavior of a service method when an unexpected response status code is received.
Default = 0

The client will throw an exception from a service method if the service returns an error response.

NoThrow = 1

The client will not throw an exception from a service method if the service returns an error response. Callers of the service method must check the Response.IsError property before accessing the response content.