net481 
namespace Microsoft.AspNet.SignalR.Client
{
    public class Connection : IConnection, IDisposable
    {
        public Version Protocol { get; set; }
    }
}
.NET Framework
4.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net481
Assembly

Microsoft.AspNet.SignalR.Client , Version=2.4.3.0, PublicKeyToken=31bf3856ad364e35

Referencing

Your project needs a package reference to Microsoft.AspNet.SignalR.Client.

Package Microsoft.AspNet.SignalR.Client (2.4.3) net45
Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API