CSHARP-3121: Remove references to NETSTANDARD1_6.

Author: rstam

src/MongoDB.Bson/IO/BsonReader.cs

@@ -297,7 +297,7 @@ public virtual IByteBuffer ReadRawBsonArray()
                 bsonWriter.WriteEndDocument();
 
                 byte[] memoryStreamBuffer;
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
                 memoryStreamBuffer = memoryStream.ToArray();
 #else
                 memoryStreamBuffer = memoryStream.GetBuffer();

src/MongoDB.Bson/IO/BsonStreamAdapter.cs

@@ -297,7 +297,7 @@ public override ArraySegment<byte> ReadCStringBytes()
                 if (b == 0)
                 {
                     byte[] memoryStreamBuffer;
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
                     memoryStreamBuffer = memoryStream.ToArray();
 #else
                     memoryStreamBuffer = memoryStream.GetBuffer();

src/MongoDB.Bson/Serialization/BsonClassMap.cs

@@ -1602,7 +1602,7 @@ private static PropertyInfo FindPropertyImplementation(PropertyInfo interfacePro
         {
             var interfaceType = interfacePropertyInfo.DeclaringType;
 
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
             var actualTypeInfo = actualType.GetTypeInfo();
             var bindingFlags = BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public;
             var actualTypePropertyInfos = actualTypeInfo.GetMembers(bindingFlags).OfType<PropertyInfo>();

src/MongoDB.Bson/Serialization/Serializers/CultureInfoSerializer.cs

@@ -73,7 +73,7 @@ protected override CultureInfo DeserializeValue(BsonDeserializationContext conte
                             case Flags.UseUserOverride: useUserOverride = _booleanSerializer.Deserialize(context); break;
                         }
                     });
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
                     if (!useUserOverride)
                     {
                         throw new FormatException("CultureInfo does not support useUserOverride on this version of the .NET Framework.");
@@ -101,7 +101,7 @@ protected override void SerializeValue(BsonSerializationContext context, BsonSer
         {
             var bsonWriter = context.Writer;
 
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
             var useUserOverride = true;
 #else
             var useUserOverride = value.UseUserOverride;

src/MongoDB.Driver.Core/Core/Authentication/GssapiAuthenticator.cs

@@ -218,7 +218,7 @@ public ISaslStep Initialize(IConnection connection, SaslConversation conversatio
 
                 if (_canonicalizeHostName)
                 {
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
                     var entry = Dns.GetHostEntryAsync(hostName).GetAwaiter().GetResult();
 #else
                     var entry = Dns.GetHostEntry(hostName);

src/MongoDB.Driver.Core/Core/Connections/SslStreamFactory.cs

@@ -47,7 +47,7 @@ public Stream CreateStream(EndPoint endPoint, CancellationToken cancellationToke
                 var sslStream = CreateSslStream(stream);
                 var targetHost = GetTargetHost(endPoint);
                 var clientCertificates = new X509CertificateCollection(_settings.ClientCertificates.ToArray());
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
                 sslStream.AuthenticateAsClientAsync(targetHost, clientCertificates, _settings.EnabledSslProtocols, _settings.CheckCertificateRevocation).GetAwaiter().GetResult();
 #else
                 sslStream.AuthenticateAsClient(targetHost, clientCertificates, _settings.EnabledSslProtocols, _settings.CheckCertificateRevocation);

src/MongoDB.Driver.Core/Core/Connections/TcpStreamFactory.cs

@@ -48,7 +48,7 @@ public TcpStreamFactory(TcpStreamSettings settings)
         // methods
         public Stream CreateStream(EndPoint endPoint, CancellationToken cancellationToken)
         {
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
             // ugh... I know... but there isn't a non-async version of dns resolution
             // in .NET Core
             var resolved = ResolveEndPointsAsync(endPoint).GetAwaiter().GetResult();
@@ -82,7 +82,7 @@ public Stream CreateStream(EndPoint endPoint, CancellationToken cancellationToke
 
         public async Task<Stream> CreateStreamAsync(EndPoint endPoint, CancellationToken cancellationToken)
         {
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
             var resolved = await ResolveEndPointsAsync(endPoint).ConfigureAwait(false);
             for (int i = 0; i < resolved.Length; i++)
             {
@@ -181,7 +181,7 @@ private async Task ConnectAsync(Socket socket, EndPoint endPoint, CancellationTo
                 try
                 {
                     var dnsEndPoint = endPoint as DnsEndPoint;
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
                     await socket.ConnectAsync(endPoint).ConfigureAwait(false);
 #else
                     if (dnsEndPoint != null)

src/MongoDB.Driver.GridFS/GridFSDownloadStream.cs

@@ -41,7 +41,7 @@ internal GridFSDownloadStream()
         public abstract GridFSFileInfo<TFileId> FileInfo { get; }
 
         // public methods
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
         /// <summary>
         /// Closes the GridFS stream.
         /// </summary>

src/MongoDB.Driver.GridFS/GridFSUploadStream.cs

@@ -61,7 +61,7 @@ internal GridFSUploadStream()
         /// <returns>A Task.</returns>
         public abstract Task AbortAsync(CancellationToken cancellationToken = default(CancellationToken));
 
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
         /// <summary>
         /// Closes the GridFS stream.
         /// </summary>

src/MongoDB.Driver.GridFS/GridFSUploadStreamCompat.cs

@@ -77,7 +77,7 @@ public ObjectId Id
             return _wrappedStream.AbortAsync(cancellationToken);
         }
 
-#if NETSTANDARD1_5 || NETSTANDARD1_6
+#if NETSTANDARD1_5
         /// <summary>
         /// Closes the GridFS stream.
         /// </summary>