NUnit.Framework.Constraints.Interval public sealed class Interval Keeps track of an interval time which can be represented in Minutes, Seconds or Milliseconds Documentation Code namespace NUnit.Framework.Constraints { public sealed class Interval { public TimeSpan AsTimeSpan { get; } public Interval InMinutes { get; } public Interval InSeconds { get; } public Interval InMilliseconds { get; } public bool IsNotZero { get; } public Interval(int value); } }