Use the regular templates since classes are now regular declaration contexts and they do not have a separate container for FunctionTemplates.

src/Generator/Generators/CLI/CLIHeadersTemplate.cs

@@ -262,11 +262,14 @@ namespace CppSharp.Generators.CLI
             var oldCtx = printer.Context;
 
             PushIndent();
-            foreach (var template in @class.FunctionTemplates)
+            foreach (var template in @class.Templates)
             {
                 if (template.Ignore) continue;
 
-                var function = template.TemplatedFunction;
+                var functionTemplate = template as FunctionTemplate;
+                if (functionTemplate == null) continue;
+
+                var function = functionTemplate.TemplatedFunction;
 
                 var typeNames = template.Parameters.Select(
                     param => "typename " + param.Name).ToList();

src/Generator/Generators/CLI/CLISourcesTemplate.cs

@@ -161,13 +161,15 @@ namespace CppSharp.Generators.CLI
 
             if (Options.GenerateFunctionTemplates)
             {
-                foreach (var template in @class.FunctionTemplates)
+                foreach (var template in @class.Templates)
                 {
-                    if (template.Ignore)
-                        continue;
+                    if (template.Ignore) continue;
+
+                    var functionTemplate = template as FunctionTemplate;
+                    if (functionTemplate == null) continue;
 
                     GenerateDeclarationCommon(template);
-                    GenerateFunctionTemplate(template, @class);
+                    GenerateFunctionTemplate(functionTemplate, @class);
                 }
             }