New Post: Scope Regions Nested View - WPF C# Prism 5.0 MEF

I got a work around for this.

In Parent I defined the ContentControl as
<ContentControl x:Name="FooChildContentControl" />

Then in the Code behind of Parent Control I create a new instance of regionManager and set to Child control as under

        IRegionManager regionManager = ServiceLocator.Current.GetInstance<IRegionManager>();
        RegionManager rm = new RegionManager();
        RegionManager.SetRegionManager(this.FooChildContentControl, rm);
        RegionManager.SetRegionName(this.FooChildContentControl, "FooChildRegion");
        rm.RegisterViewWithRegion("FooChildRegion", typeof(fooChildView ));