fixup! Add support for querying dynamic objects with Linq

Author: hazzik

src/NHibernate/Linq/Visitors/HqlGeneratorExpressionVisitor.cs

@@ -106,6 +106,8 @@ protected HqlTreeNode VisitExpression(Expression expression)
 					return VisitParameterExpression((ParameterExpression) expression);
 				case ExpressionType.TypeIs:
 					return VisitTypeBinaryExpression((TypeBinaryExpression) expression);
+				case ExpressionType.Dynamic:
+					return VisitDynamicExpression((DynamicExpression) expression);
 
 				case ExpressionType.Extension:
 					switch (expression)
@@ -143,6 +145,19 @@ protected HqlTreeNode VisitExpression(Expression expression)
 			}
 		}
 
+		private HqlTreeNode VisitDynamicExpression(DynamicExpression expression)
+		{
+			switch (expression.Binder)
+			{
+				case GetMemberBinder binder:
+					return _hqlTreeBuilder.Dot(
+						VisitExpression(expression.Arguments[1]).AsExpression(),
+						_hqlTreeBuilder.Ident(binder.Name));
+			}
+
+			throw new NotSupportedException($"Dynamic expression with a binder of {expression.Binder.GetType()} is not supported");
+		}
+
 		private HqlTreeNode VisitTypeBinaryExpression(TypeBinaryExpression expression)
 		{
 			return BuildOfType(expression.Expression, expression.TypeOperand);