Overriding BindModel and BindProperty in CustomModelBinder, but BindProperty never hit

I have a custom model binder with

public override object BindModel(controllerContext, bindingContext)

that checks session for an object and creates it if it isn't there, then returns the ob开发者_开发百科ject.

In that same model binder I have:

protected override void BindProperty(controllerContext, bindingContext, propertyDescriptor) , and for some reason  this is NEVER hit on a postback.  

BindModel() is always hit, but breakpoint on first line of BindProperty is never reached. If i comment out the BindModel() override, the BindProperty() WILL be hit. Any idea why?

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are you calling base.BindModel(args) in your overridden BindModel()? If not, the DefaultModelBinder won't try to bind the properties and won't call BindProperty.