minor fixes

Author: alex-kabin

AK.Abr/AK.Abr.csproj

@@ -25,6 +25,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -60,7 +61,7 @@
     <Compile Include="IBitmapCache.cs" />
     <Compile Include="DiskBitmapCache.cs" />
     <Compile Include="MemoryBitmapCache.cs" />
-    <Compile Include="WriteableBitmapImage.cs" />
+    <Compile Include="WritableBitmapImage.cs" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs">