Extract native field generation logic into its own method.

src/Generator/Generators/CLI/CLIHeadersTemplate.cs

@@ -215,23 +215,7 @@ namespace Cxxi.Generators.CLI
 
             if (@class.IsRefType)
             {
-                Class baseClass = null;
+                GenerateClassNativeField(@class, nativeType);
-
-                if (@class.HasBaseClass)
-                    baseClass = @class.Bases[0].Class;
-
-                var hasRefBase = baseClass != null && baseClass.IsRefType
-                    && !baseClass.Ignore;
-
-                var hasIgnoredBase = baseClass != null && baseClass.Ignore;
-
-                if (!@class.HasBase || !hasRefBase || hasIgnoredBase)
-                {
-                    PushIndent();
-                    WriteLine("property {0} NativePtr;", nativeType);
-                    PopIndent();
-                    NewLine();
-                }
             }
 
             GenerateClassConstructors(@class, nativeType);
@@ -253,6 +237,25 @@ namespace Cxxi.Generators.CLI
             WriteLine("};");
         }
 
+        public void GenerateClassNativeField(Class @class, string nativeType)
+        {
+            Class baseClass = null;
+
+            if (@class.HasBaseClass)
+                baseClass = @class.Bases[0].Class;
+
+            var hasRefBase = baseClass != null && baseClass.IsRefType
+                             && !baseClass.Ignore;
+
+            var hasIgnoredBase = baseClass != null && baseClass.Ignore;
+
+            if (!@class.HasBase || !hasRefBase || hasIgnoredBase)
+            {
+                WriteLineIndent("property {0} NativePtr;", nativeType);
+                NewLine();
+            }
+        }
+
         public void GenerateClassGenericMethods(Class @class)
         {
             var printer = TypePrinter as CLITypePrinter;