class Renderer
{
    Tenant _tenant;

    void Render(ContentType type)
    {
        switch (type)
        {
            case ContentType.JSON:
                _tenant.RenderJSON();
                break;
            default:
                _tenant.RenderHTML();
                break;
        }
    }
}

class Tenant
{
    virtual void RenderJSON() { ... };
    virtual void RenderHTML() { ... };
}

class JoeBlow : Tenant
{
    override void RenderJSON() { // joe blow's json };
}

// uses a DefaultContentTypeDelegate
IRenderer tenantADefault = new TenantARenderer();
// specify a specific content type helper object
IRenderer tenantAType1 = new TenantARender(new ContentType1Delegate());

class TenantARenderer : IRenderer {
    ...
    public render() {
        // do a bunch of tenant A specific stuff
        this.contentTypeDelegate.doSomeContentTypeSpecificStuff();
        // do some more tenant A stuff
        this.contentTypeDelegate.doSomeOtherContentTypeSpecificStuff();
    }
    ...
}