I'm using NodaTime by Npgsql.EntityFrameworkCore.PostgreSQL.NodaTime (v5.0.1) and have model:

public class A
{
    public NpgsqlRange<OffsetDateTime> VersionPeriod { get; set; }
}

When tstzrange value [2020-12-09T14:34:02.675750+03:00,) is coming from database, it throws following exception:

Unable to cast object of type 'NpgsqlTypes.NpgsqlRange`1[NodaTime.Instant]'
to type 'NpgsqlTypes.NpgsqlRange`1[NodaTime.OffsetDateTime]'.