Ninject ConstructorArguments as named parameters to a dynamic invoke

ninject-dynamic-get.cs

namespace Ninject
{
    public static class NinjectExtensions
    {
        private class DynKernel : DynamicObject
        {
            private readonly IKernel kernel;

            public DynKernel(IKernel inner)
            {
                this.kernel = inner;
            }

            public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
            {
                Contract.Assume(binder.Name == "Get", "Only supporting Get<T>");

                var csBinder = binder.GetType().GetInterface(
                    "Microsoft.CSharp.RuntimeBinder.ICSharpInvokeOrInvokeMemberBinder");
                var typeArgs = csBinder.GetProperty("TypeArguments").GetValue(binder, null)
                    as IList<Type>;

                Contract.Assume(typeArgs != null && typeArgs.Count == 1,
                    "There should be exactly one type parameter to this call");

                var typeArg = typeArgs[0];

                Contract.Assume(
                    binder.CallInfo.ArgumentCount == binder.CallInfo.ArgumentNames.Count,
                    "All arguments should be named");

                var ctorArgs = args.Zip(binder.CallInfo.ArgumentNames, 
                    (v, k) => new ConstructorArgument(k, v)).Cast<IParameter>().ToArray();

                result = this.kernel.Get(typeArg, ctorArgs);
                return true;
            }
        }

        public static dynamic AsDynamic(this IKernel k)
        {
            return new DynKernel(k);
        }
    }
}