Fix usings inclusion

***NO_CI***

Author: josesimoes

NFUnitTest/Properties/AssemblyInfo.cs

@@ -4,6 +4,9 @@
 // General Information about an assembly is controlled through the following 
 // set of attributes. Change these attribute values to modify the information
 // associated with an assembly.
+using System.Reflection;
+using System.Runtime.InteropServices;
+
 [assembly: AssemblyDescription("")]
 [assembly: AssemblyConfiguration("")]
 [assembly: AssemblyCompany("")]

Shared/MessagePack/Converters/DoubleConverter.cs

@@ -1,7 +1,9 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
 using System;
+#endif
 using System.Diagnostics.CodeAnalysis;
 using nanoFramework.MessagePack.Extensions;
 using nanoFramework.MessagePack.Stream;

Shared/MessagePack/Dto/ArraySegment.cs

@@ -1,7 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
 using System;
+using System.IO;
+#endif
 using System.Collections;
 using nanoFramework.MessagePack.Stream;
 using nanoFramework.MessagePack.Utility;

Shared/MessagePack/MessagePackSerializer.cs

@@ -1,7 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
 using System;
+using System.IO;
+#endif
 using nanoFramework.MessagePack.Stream;
 
 namespace nanoFramework.MessagePack

Shared/MessagePack/Stream/BaseReader.cs

@@ -1,6 +1,9 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
+using System.IO;
+#endif
 using nanoFramework.MessagePack.Dto;
 using nanoFramework.MessagePack.Extensions;
 using nanoFramework.MessagePack.Utility;

Shared/MessagePack/Stream/ByteArrayReader.cs

@@ -1,7 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
 using System;
+using System.IO;
+#endif
 using nanoFramework.MessagePack.Dto;
 
 namespace nanoFramework.MessagePack.Stream

Shared/MessagePack/Stream/IMessagePackReader.cs

@@ -1,6 +1,9 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
+using System.IO;
+#endif
 using nanoFramework.MessagePack.Dto;
 
 namespace nanoFramework.MessagePack.Stream

Shared/MessagePack/Stream/MemoryStreamReader.cs

@@ -1,7 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
 using System;
+using System.IO;
+#endif
 using System.Collections;
 using nanoFramework.MessagePack.Dto;
 using nanoFramework.MessagePack.Utility;

Shared/MessagePack/Stream/MemoryStreamWriter.cs

@@ -1,7 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
 using System;
+using System.IO;
+#endif
 using nanoFramework.MessagePack.Extensions;
 
 namespace nanoFramework.MessagePack.Stream

UnitTestShared/Helpers/TestsHelper.cs

@@ -1,6 +1,9 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if NANOFRAMEWORK_1_0
+using System;
+#endif
 using System.Collections;
 using System.Text;
 using UnitTestShared.TestData;