.NET8 as Framework target added

This is needed for addition Pull Request using Linux Features (TCP
KeepAlive)

Author: Christoph Bauer

.travis.yml

@@ -10,6 +10,6 @@ addons:
 
 script:
   - dotnet restore src/NetMQ.sln
-  - dotnet build -v q -f netstandard2.0 src/NetMQ/NetMQ.csproj
+  - dotnet build -v q -f netstandard2.1 src/NetMQ/NetMQ.csproj
   - dotnet test -v n --logger "Console;noprogress=true" -p:ParallelizeTestCollections=false -f netcoreapp2.1 --filter Category!=Beacon src/NetMQ.Tests/NetMQ.Tests.csproj -- RunConfiguration.ReporterSwitch=verbose
 

src/NetMQ/Annotations.cs

@@ -1,6 +1,6 @@
 // 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.md file in the project root for more information.
 
-#if !NETSTANDARD2_1
+#if NETFRAMEWORK
 
 namespace System.Diagnostics.CodeAnalysis
 {

src/NetMQ/AsyncReceiveExtensions.cs

@@ -1,5 +1,4 @@
-#if NETSTANDARD2_0 || NETSTANDARD2_1 || NET47
-
+
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -308,4 +307,3 @@ public static async Task SkipMultipartMessageAsync(this NetMQSocket socket)
     }
 }
 
-#endif

src/NetMQ/Core/Mechanisms/CurveClientMechanism.cs

@@ -189,7 +189,7 @@ PullMsgResult ProduceInitiate(ref Msg msg)
 
             VouchNoncePrefix.CopyTo(vouchNonce);
             using var rng = RandomNumberGenerator.Create();
-#if NETSTANDARD2_1
+#if NETSTANDARD || NET
             rng.GetBytes(vouchNonce.Slice(8));
 #else
             byte[] temp = new byte[16];

src/NetMQ/Core/Mechanisms/CurveServerMechanism.cs

@@ -157,7 +157,7 @@ PullMsgResult ProduceWelcome(ref Msg msg)
             //  8-byte prefix plus 16-byte random nonce
             CookieNoncePrefix.CopyTo(cookieNonce);
             using var rng = RandomNumberGenerator.Create();
-#if NETSTANDARD2_1
+#if NETSTANDARD || NET
             rng.GetBytes(cookieNonce.Slice(8));
 #else
             byte[] temp = new byte[16];
@@ -184,7 +184,7 @@ PullMsgResult ProduceWelcome(ref Msg msg)
             //  Create full nonce for encryption
             //  8-byte prefix plus 16-byte random nonce
             WelcomeNoncePrefix.CopyTo(welcomeNonce);
-#if NETSTANDARD2_1
+#if NETSTANDARD || NET
             rng.GetBytes(welcomeNonce.Slice(8));
 #else
             rng.GetBytes(temp);

src/NetMQ/Core/Transports/Pgm/PgmSocket.cs

@@ -97,7 +97,7 @@ internal void Init()
                 Debug.WriteLine(xMsg);
 
                 // If running on Microsoft Windows, suggest to the developer that he may need to install MSMQ in order to get PGM socket support.
-#if NETSTANDARD1_1_OR_GREATER
+#if NETSTANDARD || NET
                 bool isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
 #else
                 bool isWindows = true;

src/NetMQ/Core/Transports/Tcp/TcpListener.cs

@@ -22,7 +22,7 @@ You should have received a copy of the GNU Lesser General Public License
 using System;
 using System.Diagnostics;
 using System.Net.Sockets;
-#if NETSTANDARD2_0 || NETSTANDARD2_1
+#if NETSTANDARD || NET
 using System.Runtime.InteropServices;
 #endif
 using AsyncIO;
@@ -142,7 +142,7 @@ public virtual void SetAddress(string addr)
                     }
                 }
 
-#if NETSTANDARD2_0 || NETSTANDARD2_1
+#if NETSTANDARD || NET
                 // This command is failing on linux
                 if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
                     m_handle.ExclusiveAddressUse = false;

src/NetMQ/Core/Utils/OpCode.cs

@@ -20,7 +20,7 @@ public static bool Open()
             string val = Environment.GetEnvironmentVariable("NETQM_SUPPRESS_RDTSC");
             if (!string.IsNullOrEmpty(val))
                 return false;
-#if NETSTANDARD1_1_OR_GREATER || NET471_OR_GREATER
+#if NETSTANDARD || NET || NET471_OR_GREATER
             if (RuntimeInformation.ProcessArchitecture != Architecture.X86 &&
                 RuntimeInformation.ProcessArchitecture != Architecture.X64)
             {

src/NetMQ/Core/Utils/SpanUtility.cs

@@ -7,7 +7,7 @@ internal static class SpanUtility
     {
         public static string ToAscii(Span<byte> bytes)
         {
-#if NETSTANDARD2_1
+#if NETSTANDARD || NET
             return Encoding.ASCII.GetString(bytes);
 #else
             return Encoding.ASCII.GetString(bytes.ToArray());

src/NetMQ/GroupSocketExtensions.cs

@@ -376,7 +376,7 @@ public static bool TryReceiveBytes(this IGroupInSocket socket, TimeSpan timeout,
 
         #region AsyncEnumerable
 
-#if NETSTANDARD2_1
+#if NETSTANDARD || NET
         /// <summary>
         /// Provides a consuming IAsyncEnumerable for receiving messages from the socket.
         /// </summary>
@@ -575,7 +575,7 @@ public static bool TryReceiveString(this IGroupInSocket socket, TimeSpan timeout
 
         #region AsyncEnumerable
 
-#if NETSTANDARD2_1
+#if NETSTANDARD || NET
         /// <summary>
         /// Provides a consuming IAsyncEnumerable for receiving messages from the socket.
         /// </summary>