EF Core Property Mapping

Entity Framework Core provides a range of options for configuring entity properties using the Fluent API. These options are available as methods that can be chained to the EntityTypeBuilder.Property method, which is available in a number of versions. Some take the name of the property to be configured as strings:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Entity>().Property(typeof(string), "PropertyName")...
}

or

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Entity>().Property<string>("PropertyName")....
}

Most often, you will see the version that takes a lambda expression denoting the property to be configured. This option provides strong typing and therefore Intellisense assistance and is the preferred option used throughout this guide:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
   modelBuilder.Entity<EntityName>().Property(p => p.PropertyName)...
}

Methods available for property configuration are detailed below. Note that a number of additional provider-specific methods may also become available depending on the database provider that you use.