Fix build fails when built on macOS and Linux

src/Discord.Net.Core/Discord.Net.Core.csproj

@@ -1,14 +1,26 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="../../Discord.Net.targets" />
-  <PropertyGroup>
-    <AssemblyName>Discord.Net.Core</AssemblyName>
-    <RootNamespace>Discord</RootNamespace>
-    <Description>The core components for the Discord.Net library.</Description>
-    <TargetFrameworks>net45;netstandard1.1;netstandard1.3</TargetFrameworks>
-  </PropertyGroup>
+  <Choose>
+    <When Condition=" '$(OS)' == 'Windows_NT' ">
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.Core</AssemblyName>
+        <RootNamespace>Discord</RootNamespace>
+        <Description>The core components for the Discord.Net library.</Description>
+        <TargetFrameworks>net45;netstandard1.1;netstandard1.3</TargetFrameworks>
+      </PropertyGroup>
+    </When>
+    <Otherwise>
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.Core</AssemblyName>
+        <RootNamespace>Discord</RootNamespace>
+        <Description>The core components for the Discord.Net library.</Description>
+        <TargetFrameworks>netstandard1.1;netstandard1.3</TargetFrameworks>
+      </PropertyGroup>
+    </Otherwise>
+  </Choose>
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="10.0.2" />
     <PackageReference Include="System.Collections.Immutable" Version="1.3.1" />
     <PackageReference Include="System.Interactive.Async" Version="3.1.1" />
   </ItemGroup>
-</Project>
+</Project>

src/Discord.Net.DebugTools/Discord.Net.DebugTools.csproj

@@ -1,12 +1,24 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="../../Discord.Net.targets" />
-  <PropertyGroup>
-    <AssemblyName>Discord.Net.DebugTools</AssemblyName>
-    <RootNamespace>Discord</RootNamespace>
-    <Description>A Discord.Net extension adding some helper classes for diagnosing issues.</Description>
-    <TargetFrameworks>net45;netstandard1.3</TargetFrameworks>
-  </PropertyGroup>
+  <Choose>
+    <When Condition=" '$(OS)' == 'Windows_NT' ">
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.DebugTools</AssemblyName>
+        <RootNamespace>Discord</RootNamespace>
+        <Description>A Discord.Net extension adding some helper classes for diagnosing issues.</Description>
+        <TargetFrameworks>net45;netstandard1.3</TargetFrameworks>
+      </PropertyGroup>
+    </When>
+    <Otherwise>
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.DebugTools</AssemblyName>
+        <RootNamespace>Discord</RootNamespace>
+        <Description>A Discord.Net extension adding some helper classes for diagnosing issues.</Description>
+        <TargetFrameworks>netstandard1.3</TargetFrameworks>
+      </PropertyGroup>
+    </Otherwise>
+  </Choose>
   <ItemGroup>
     <ProjectReference Include="..\Discord.Net.Core\Discord.Net.Core.csproj" />
   </ItemGroup>
-</Project>
+</Project>

src/Discord.Net.Rest/Discord.Net.Rest.csproj

@@ -1,19 +1,37 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="../../Discord.Net.targets" />
-  <PropertyGroup>
-    <AssemblyName>Discord.Net.Rest</AssemblyName>
-    <RootNamespace>Discord.Rest</RootNamespace>
-    <Description>A core Discord.Net library containing the REST client and models.</Description>
-    <TargetFrameworks>net45;netstandard1.1;netstandard1.3</TargetFrameworks>
-  </PropertyGroup>
+  <Choose>
+    <When Condition=" '$(OS)' == 'Windows_NT' ">
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.Rest</AssemblyName>
+        <RootNamespace>Discord.Rest</RootNamespace>
+        <Description>A core Discord.Net library containing the REST client and models.</Description>
+        <TargetFrameworks>net45;netstandard1.1;netstandard1.3</TargetFrameworks>
+      </PropertyGroup>
+    </When>
+    <Otherwise>
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.Rest</AssemblyName>
+        <RootNamespace>Discord.Rest</RootNamespace>
+        <Description>A core Discord.Net library containing the REST client and models.</Description>
+        <TargetFrameworks>netstandard1.1;netstandard1.3</TargetFrameworks>
+      </PropertyGroup>
+    </Otherwise>
+  </Choose>
   <ItemGroup>
     <ProjectReference Include="..\Discord.Net.Core\Discord.Net.Core.csproj" />
   </ItemGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' != 'net45' ">
-    <PackageReference Include="System.Net.Http" Version="4.3.2" />
-    <!-- https://github.com/dotnet/corefx/issues/19535 -->
-  </ItemGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">
-    <Reference Include="System.Net.Http" />
-  </ItemGroup>
-</Project>
+  <Choose>
+    <When Condition=" '$(TargetFramework)' != 'net45' ">
+      <ItemGroup>
+        <PackageReference Include="System.Net.Http" Version="4.3.2" />
+        <!-- https://github.com/dotnet/corefx/issues/19535 -->
+      </ItemGroup>
+    </When>
+    <Otherwise>
+      <ItemGroup>
+        <Reference Include="System.Net.Http" />
+      </ItemGroup>
+    </Otherwise>
+  </Choose>
+</Project>

src/Discord.Net.WebSocket/Discord.Net.WebSocket.csproj

@@ -1,12 +1,25 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="../../Discord.Net.targets" />
-  <PropertyGroup>
-    <AssemblyName>Discord.Net.WebSocket</AssemblyName>
-    <RootNamespace>Discord.WebSocket</RootNamespace>
-    <Description>A core Discord.Net library containing the WebSocket client and models.</Description>
-    <TargetFrameworks>net45;netstandard1.1;netstandard1.3</TargetFrameworks>
-    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-  </PropertyGroup>
+  <Choose>
+    <When Condition=" '$(OS)' == 'Windows_NT' ">
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.WebSocket</AssemblyName>
+        <RootNamespace>Discord.WebSocket</RootNamespace>
+        <Description>A core Discord.Net library containing the WebSocket client and models.</Description>
+        <TargetFrameworks>net45;netstandard1.1;netstandard1.3</TargetFrameworks>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+      </PropertyGroup>
+    </When>
+    <Otherwise>
+      <PropertyGroup>
+        <AssemblyName>Discord.Net.WebSocket</AssemblyName>
+        <RootNamespace>Discord.WebSocket</RootNamespace>
+        <Description>A core Discord.Net library containing the WebSocket client and models.</Description>
+        <TargetFrameworks>netstandard1.1;netstandard1.3</TargetFrameworks>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+      </PropertyGroup>
+    </Otherwise>
+  </Choose>
   <ItemGroup>
     <ProjectReference Include="..\Discord.Net.Core\Discord.Net.Core.csproj" />
     <ProjectReference Include="..\Discord.Net.Rest\Discord.Net.Rest.csproj" />
@@ -14,4 +27,4 @@
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
     <PackageReference Include="System.Net.WebSockets.Client" Version="4.3.1" />
   </ItemGroup>
-</Project>
+</Project>