public class BloggingContext : DbContext
    {        
        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            loadEntities(modelBuilder,
            asmPath: @"D:\Prog\SomeAsm1\bin\Debug\netstandard2.0\SomeAsm1.dll",
            nameSpace: "SomeAsm1.Models");
            base.OnModelCreating(modelBuilder);
        }

        private static void loadEntities(ModelBuilder modelBuilder, string asmPath, string nameSpace)
        {
            var modelInAssembly = AssemblyLoadContext.Default.LoadFromAssemblyPath(asmPath);
            // var modelInAssembly = Assembly.Load(new AssemblyName("ModuleApp"));
            var entityMethod = typeof(ModelBuilder).GetMethod("Entity", new Type[] { });
            foreach (var type in modelInAssembly.ExportedTypes)
            {
                if (type.BaseType is System.Object && !type.IsAbstract && type.Namespace == nameSpace)
                {
                    entityMethod.MakeGenericMethod(type).Invoke(modelBuilder, new object[] { });
                }
            }
        }