namespace System.ServiceModel.Channels { public abstract class ChannelBase : CommunicationObject, IChannel, ICommunicationObject, IDefaultCommunicationTimeouts { protected TimeSpan DefaultReceiveTimeout { get; } protected TimeSpan DefaultSendTimeout { get; } protected ChannelManagerBase Manager { get; } protected ChannelBase(ChannelManagerBase channelManager); public virtual T GetProperty<T>() where T : class; } }