Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6

mcs/class/System/System.Net.Security/SslApplicationProtocol.pns.cs

@@ -0,0 +1,24 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System.Net.Security
+{
+    public delegate System.Security.Cryptography.X509Certificates.X509Certificate ServerCertificateSelectionCallback(object sender, string hostName);
+    
+    public readonly partial struct SslApplicationProtocol : System.IEquatable<System.Net.Security.SslApplicationProtocol>
+    {
+        private readonly object _dummy;
+        public static readonly System.Net.Security.SslApplicationProtocol Http11;
+        public static readonly System.Net.Security.SslApplicationProtocol Http2;
+        public SslApplicationProtocol(byte[] protocol) { throw new PlatformNotSupportedException(); }
+        public SslApplicationProtocol(string protocol) { throw new PlatformNotSupportedException(); }
+        public System.ReadOnlyMemory<byte> Protocol { get { throw new PlatformNotSupportedException(); } }
+        public bool Equals(System.Net.Security.SslApplicationProtocol other) { throw new PlatformNotSupportedException(); }
+        public override bool Equals(object obj) { throw new PlatformNotSupportedException(); }
+        public override int GetHashCode() { throw new PlatformNotSupportedException(); }
+        public static bool operator ==(System.Net.Security.SslApplicationProtocol left, System.Net.Security.SslApplicationProtocol right) { throw new PlatformNotSupportedException(); }
+        public static bool operator !=(System.Net.Security.SslApplicationProtocol left, System.Net.Security.SslApplicationProtocol right) { throw new PlatformNotSupportedException(); }
+        public override string ToString() { throw new PlatformNotSupportedException(); }
+    }
+}