Standardizes on NET451, NET46, and the lowest netstandard I can use

Author: ThadHouse

src/FRC-Utilities/FRC-Utilities.csproj

@@ -6,7 +6,7 @@
     <AssemblyTitle>FRC Utilities</AssemblyTitle>
     <Title>FRC Utilities</Title>
     <Authors>RobotDotNet</Authors>
-    <TargetFrameworks>net40;net46;netstandard1.5</TargetFrameworks>
+    <TargetFrameworks>net451;net46;netstandard1.5</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <AssemblyName>FRC.Utilities</AssemblyName>
     <PackageId>FRC.Utilities</PackageId>
@@ -40,8 +40,8 @@
     <DefineConstants>$(DefineConstants);NET46</DefineConstants>
   </PropertyGroup>
 
-  <PropertyGroup Condition=" '$(TargetFramework)' == 'net40' ">
-    <DefineConstants>$(DefineConstants);NET40</DefineConstants>
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'net451' ">
+    <DefineConstants>$(DefineConstants);NET451</DefineConstants>
   </PropertyGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.5' ">

src/FRC-Utilities/RefList.cs

@@ -34,10 +34,7 @@ namespace FRC
     [DebuggerDisplay("Count = {Count}")]
     [Serializable]
 #endif
-    internal class RefList<T> : IList<T>, System.Collections.IList
-#if !NET40
-        , IReadOnlyList<T>
-#endif
+    internal class RefList<T> : IList<T>, System.Collections.IList, IReadOnlyList<T>
     {
         private const int _defaultCapacity = 4;
 

src/FRC-Utilities/UTF8String.cs

@@ -52,7 +52,7 @@ public static string ReadUTF8String(IntPtr str, UIntPtr size)
         {
             unsafe
             {
-#if (NETSTANDARD || NET46)
+#if (!NET451)
                 return Encoding.UTF8.GetString((byte*)str, (int)size);
 #else
                 int iSize = (int)size.ToUInt64();