Display data using a multiple content picker data type (Umbraco 7.4)

- Create a new data type using property editor 'Multinode TreePicker' with a 'Content' node type. 

- Give it the name 'Multiple Content Picker'

- Go to the Document Type of the page you'd like to display the content and add a property called 'Related Blog Posts' with an alias of 'relatedPosts'. Use the same type we just created ('Multiple Content Picker').

- Add the following code to your template: