net481 
namespace Microsoft.Data.Entity.Metadata.Internal
{
    public class InternalEntityTypeBuilder : InternalMetadataItemBuilder<EntityType>
    {
        public virtual InternalRelationshipBuilder Relationship(InternalEntityTypeBuilder principalEntityTypeBuilder, ConfigurationSource configurationSource);
    }
}
.NET Framework
4.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net481
Assembly

EntityFramework.Core , Version=7.0.0.0, PublicKeyToken=adb9793829ddae60

Referencing

Your project needs a package reference to EntityFramework.Core.

Package EntityFramework.Core (7.0.0-rc1-final) net451
Preview This API is contained in a prerelease package.
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  • Package-provided API