public void ContainsTest() { var document = new CsvDocument <Person>(new Person[] { new Person { Name = "Akari", Age = 20 }, new Person { Name = "Kyoko", Age = 21 }, new Person { Name = "Yui", Age = 22 }, new Person { Name = "Chinatsu", Age = 19 } }); Assert.IsTrue(document.Contains(new Person { Name = "Akari", Age = 20 })); Assert.IsTrue(document.Contains(new Person { Name = "Kyoko", Age = 21 })); Assert.IsTrue(document.Contains(new Person { Name = "Yui", Age = 22 })); Assert.IsTrue(document.Contains(new Person { Name = "Chinatsu", Age = 19 })); }