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 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.