<PackageReference Include="NUnit" Version="3.4.1" />

ExactCountOperator

Represents a constraint that succeeds if the specified count of members of a collection match a base constraint.
namespace NUnit.Framework.Constraints { public class ExactCountOperator : CollectionOperator { private int expectedCount; public ExactCountOperator(int expectedCount) { this.expectedCount = expectedCount; } public override IConstraint ApplyPrefix(IConstraint constraint) { return new ExactCountConstraint(expectedCount, constraint); } } }