netcoreapp1.0 
namespace System.Net.WebSockets
{
    public sealed class WebSocketException : Exception
    {
        public int ErrorCode { get; }
    }
}
.NET
5.06.07.08.09.010.011.0
.NET Core
1.01.12.02.12.23.03.1
.NET Framework
4.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard
1.31.41.51.62.02.1
Information specific to netcoreapp1.0
Assembly

System.Net.WebSockets , Version=4.0.0.0, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs a package reference to System.Net.WebSockets.

Package System.Net.WebSockets (4.3.0) netstandard1.3
Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API