Unity Engine documentationScript ReferenceUnityEngineContactPairHeaderPairCountNumber of ContactPair s that this header contains.Read time 1 minuteLast updated 4 days agoDefinition Type: Property Namespace: UnityEngine Assembly: UnityEngine.PhysicsModule WarningDeprecated. Please use ContactPairHeader.pairCount instead.Upgrade to ContactPairHeader.pairCount public int PairCount { get; }