Bug fix: CompositionProxyTypeBuilder crashed when class has protected constructor.

src/Spring/Spring.Core/Proxy/CompositionProxyTypeBuilder.cs

@@ -197,8 +197,8 @@ namespace Spring.Proxy
             {
                 il.Emit(OpCodes.Ldarg_S, i);
             }
-            il.Emit(OpCodes.Newobj, TargetType.GetConstructor(
-                ReflectionUtils.GetParameterTypes(constructor.GetParameters())));
+
+            il.Emit(OpCodes.Newobj, constructor);
             il.Emit(OpCodes.Stfld, targetInstance);
         }
 

test/Spring/Spring.Core.Tests/Objects/ClassWithProtectedCtor.cs

@@ -0,0 +1,13 @@
+namespace Spring.Objects
+{
+    public class ClassWithProtectedCtor : IOther
+    {
+        protected ClassWithProtectedCtor()
+        {
+        }
+
+        public void Absquatulate()
+        {                
+        }
+    }
+}