implement

dotnet/AipsCore/Domain/Common/Validation/ValidationException.cs

@@ -10,4 +10,9 @@ public class ValidationException : Exception
     {
         ValidationErrors = validationErrors;
     }
+
+    public ValidationException(ValidationError validationError)
+        : this([validationError])
+    {
+    }
 }

dotnet/AipsCore/Domain/Common/ValueObjects/DomainId.cs

@@ -22,4 +22,9 @@ public record DomainId : AbstractValueObject
             new MinLengthRule(IdValue, 5)
         ];
     }
+
+    public override string ToString()
+    {
+        return IdValue;
+    }
 }