Adjust exceptions, to be squashed.

Author: fredericDelaporte

src/NHibernate/Criterion/EntityProjection.cs

@@ -138,7 +138,10 @@ private void SetFields(ICriteriaQuery criteriaQuery)
 
 			if (!(criteriaQuery is ISupportEntityProjectionCriteriaQuery entityProjectionQuery))
 			{
-				throw new HibernateException($"Projecting to entities requires a '{criteriaQuery.GetType().FullName}' type to implement {nameof(ISupportEntityProjectionCriteriaQuery)} interface.");
+				throw new ArgumentException(
+					$"Projecting to entities requires a '{criteriaQuery.GetType().FullName}' type to implement " +
+					$"{nameof(ISupportEntityProjectionCriteriaQuery)} interface.",
+					nameof(criteriaQuery));
 			}
 
 			var criteria = entityProjectionQuery.RootCriteria;

src/NHibernate/Criterion/ProjectionsExtensions.cs

@@ -340,7 +340,7 @@ internal static IProjection ProcessMod(MethodCallExpression methodCallExpression
 		/// </summary>
 		public static T AsEntity<T>(this T alias) where T:class
 		{
-			throw new Exception("Not to be used directly - use inside QueryOver expression");
+			throw QueryOver.GetDirectUsageException();
 		}
 
 		internal static IProjection ProcessAsEntity(MethodCallExpression methodCallExpression)