nunit Fluent Assertions
Remarks
NUnit's Assert.That() form supports the use of constraints as its second parameter. All constraints provided out of the box by NUnit are available through the static classes Is, Has and Does. Constraints can be combined into fluent expressions using the built in methods And, Or and With. Expressions can be conveniently expanded up using the many methods in ConstraintExpression, such as AtMost and Contains.
