public void TestConcatOperator()
{
EntityCollection<TestAccountEntity> entities = new EntityCollection<TestAccountEntity>();
entities.Add(new TestAccountEntity(100, 5));
entities.Add(new TestAccountEntity(102, 8));
EntityCollection<TestAccountEntity> entities0 = new EntityCollection<TestAccountEntity>();
entities0.Add(new TestAccountEntity(103, 15));
entities0.Add(new TestAccountEntity(104, 2));
IEnumerable<TestAccountEntity> result = entities.Concat(entities0);
Assert.IsNotNull(result);
foreach (TestAccountEntity entity in result)
{
Assert.IsNotNull(entity);
Console.WriteLine(entity);
}
}