optimized usage of Reflection in ValidationHelper

(cherry picked from commit 2d9961a8)

VectoCommon/VectoCommon/Utils/Validation.cs

@@ -114,19 +114,31 @@ namespace TUGraz.VectoCommon.Utils
 			const BindingFlags flags =
 				BindingFlags.Instance | BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public |
 				BindingFlags.FlattenHierarchy;
-			var prop = obj.GetProperty(m.Name, flags);
-			if (prop != null) {
-				attributes = prop.GetCustomAttributes(typeof(T))
-					.Cast<T>()
-					.Concat(obj.GetInterfaces().SelectMany(m.GetAttributes<T>));
+
+			if (m.MemberType == MemberTypes.Property) {
+				PropertyInfo prop = m as PropertyInfo ?? obj.GetProperty(m.Name, flags);
+				//var prop = obj.GetProperty(m.Name, flags);
+				if (prop != null)
+				{
+					//if (m is PropertyInfo prop) {
+					attributes = prop.GetCustomAttributes(typeof(T))
+						.Cast<T>()
+						.Concat(obj.GetInterfaces().SelectMany(m.GetAttributes<T>));
+				}
 			}
 
-			var field = obj.GetField(m.Name, flags);
-			if (field != null) {
-				attributes =
-					attributes.Concat(
-						field.GetCustomAttributes(typeof(T)).Cast<T>().Concat(obj.GetInterfaces().SelectMany(m.GetAttributes<T>)));
+			if (m.MemberType == MemberTypes.Field) {
+				FieldInfo field = m as FieldInfo ?? obj.GetField(m.Name, flags);
+				//var field = obj.GetField(m.Name, flags);
+				if (field != null)
+				{
+					//if (m is FieldInfo field) {
+					attributes =
+						attributes.Concat(
+							field.GetCustomAttributes(typeof(T)).Cast<T>().Concat(obj.GetInterfaces().SelectMany(m.GetAttributes<T>)));
+				}
 			}
+            
 
 			return attributes;
 		}