What are navigation properties in Entity Framework?

A navigation property is an optional property on an entity type that allows for navigation from one end of an association to the other end. Unlike other properties, navigation properties do not carry data.

What is navigation property in Entity Framework Core?

A Navigation Property is a property that defined on the principal and/or dependent entity that contains a reference to the related entity. Navigation properties describe the relationship between two entity types. They allow us to navigate from one end of the relationship to the other end.

What are the different relationship patterns in Entity Framework?

Entity framework supports three types of relationships, same as database: 1) One-to-One 2) One-to-Many, and 3) Many-to-Many.

How do I set navigation property in Entity Framework Core?

If the dependent entity contains a property with a name matching one of these patterns then it will be configured as the foreign key:

2. Id.
4. Id.

What are the different types of properties supported in Entity Framework?

There are two types of Entities in Entity Framework: POCO Entities and Dynamic Proxy Entities.

How do you add relationships in Entity Framework?

Include Foreign Key Properties in Your Entities (Referential Constraints)

1. Double-click the association that you want to edit.
2. From the Principal drop-down list, select the principal entity in the referential constraint.
3. From the Dependent drop-down list, select the dependent entity in the referential constraint.

What method can be used to load the navigation property of the same entity in Entity Framework?

Explicitly Loading The Reference method should be used when an entity has a navigation property to another single entity. On the other hand, the Collection method should be used when an entity has a navigation property to a collection of other entities.

What is relationship entity relationship?

Within entity-relationship diagrams, relationships are used to document the interaction between two entities. Relationships are usually verbs such as assign, associate, or track and provide useful information that could not be discerned with just the entity types.

What is Poco in EF?

POCO Entities (Plain Old CLR Object) A POCO entity is a class that doesn’t depend on any framework-specific base class. It is like any other normal . NET CLR class, which is why it is called “Plain Old CLR Objects”. POCO entities are supported in both EF 6 and EF Core.

What is T4 template in Entity Framework?

T4 stands for Text template transformation toolkit which is a template-based code generation engine built into Visual Studio. T4 engine allows you to generate C#, T-SQL, XML or any other text files by using ASP.NET – ASPX template like syntax.

What is an Entity Framework relationship navigation property?

Navigation properties describe the relationship between two entity types. They allow us to navigate from one end of the relationship to the other end. A relationship in the Entity Framework always has two endpoints. Each endpoint, which participates in the relationship must return a navigation property describing the relationship.

How are navigation properties configured in a relationship?

The most common pattern for relationships is to have navigation properties defined on both ends of the relationship and a foreign key property defined in the dependent entity class. If a pair of navigation properties is found between two types, then they will be configured as inverse navigation properties of the same relationship.

What is the use of entity navigation property in LINQ?

Navigation properties allow a user to navigate from one entity to another, or from one entity to related entities through an association set. This topic provides examples in query expression syntax of how to navigate relationships through navigation properties in LINQ to Entities queries.

What are the different types of entities in a relationship?

There are a number of terms used to describe relationships Dependent entity: This is the entity that contains the foreign key properties. Sometimes referred to as the ‘child’ of the relationship. Principal entity: This is the entity that contains the primary/alternate key properties.