Fix sandbox build

tests/ImageSharp.Sandbox46/ImageSharp.Sandbox46.csproj

@@ -5,6 +5,11 @@
     <RuntimeIdentifier>win7-x64</RuntimeIdentifier>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <Prefer32Bit>false</Prefer32Bit>
+    <AssemblyName>ImageSharp.Sandbox46</AssemblyName>
+    <Description>A cross-platform library for processing of image files written in C#</Description>
+    <Copyright>Copyright © James Jackson-South and contributors.</Copyright>
+    <Authors>James Jackson-South and contributors</Authors>
+    <Company>James Jackson-South</Company>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\ImageSharp.Drawing\ImageSharp.Drawing.csproj" />
@@ -21,4 +26,7 @@
     <Compile Remove="..\ImageSharp.Tests\obj\**\*.cs" />
     <Compile Remove="..\ImageSharp.Tests\bin\**\*.cs" />
   </ItemGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.CSharp" />
+  </ItemGroup>
 </Project>

tests/ImageSharp.Sandbox46/Properties/AssemblyInfo.cs

@@ -6,16 +6,6 @@ using System.Runtime.InteropServices;
 // set of attributes. Change these attribute values to modify the information
 // associated with an assembly.
 
-[assembly: AssemblyTitle("ImageSharp.Sandbox46")]
-[assembly: AssemblyDescription("A cross-platform library for processing of image files written in C#")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("ImageSharp.Sandbox46")]
-[assembly: AssemblyCopyright("Copyright © James Jackson-South and contributors.")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-
 // Setting ComVisible to false makes the types in this assembly not visible
 // to COM components.  If you need to access a type in this assembly from
 // COM, set the ComVisible attribute to true on that type.