DefaultLazyInitializer - remove code duplication

Author: hazzik

src/NHibernate/Proxy/DefaultLazyInitializer.cs

@@ -4,16 +4,13 @@
 using NHibernate.Proxy.DynamicProxy;
 using NHibernate.Proxy.Poco;
 using NHibernate.Type;
+using NHibernate.Util;
 
 namespace NHibernate.Proxy
 {
 	[Serializable]
 	public class DefaultLazyInitializer : BasicLazyInitializer, DynamicProxy.IInterceptor
 	{
-		[NonSerialized]
-		private static readonly MethodInfo exceptionInternalPreserveStackTrace =
-			typeof (Exception).GetMethod("InternalPreserveStackTrace", BindingFlags.Instance | BindingFlags.NonPublic);
-
 		public DefaultLazyInitializer(string entityName, System.Type persistentClass, object id, MethodInfo getIdentifierMethod,
 							   MethodInfo setIdentifierMethod, IAbstractComponentType componentIdType,
 							   ISessionImplementor session)
@@ -38,8 +35,7 @@ public object Intercept(InvocationInfo info)
 			}
 			catch (TargetInvocationException ex)
 			{
-				exceptionInternalPreserveStackTrace.Invoke(ex.InnerException, new Object[] {});
-				throw ex.InnerException;
+				throw ReflectHelper.UnwrapTargetInvocationException(ex);
 			}
 
 			return returnValue;