Added a unit test to confirm that the code point encoding works correctly.

UnicodeInformation.Builder/Properties/AssemblyInfo.cs

@@ -13,6 +13,9 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyCopyright("Copyright ©  2014")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
+#if DEBUG
+[assembly: InternalsVisibleTo("UnicodeInformation.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100711da5e71bb2208797ed36597e628c6bf6541b6c157ede943539d19de5104763bd2f42d8c0233ea8fbe7e782d4e2d29c3706a8e8dc1cfa78faabec946a167f7b2b1d396d17a85839ad96f2be930c0efaa893c8b9b6a665bf50ca569b56b9eabf3a69e8274723f85e9d4c3eea1e53dcbbb29a74c78c305e447917daaa6593f1c2")]
+#endif
 
 // 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 

UnicodeInformation.Tests/UnicodeDataManagerTests.cs

@@ -5,6 +5,7 @@ using System.Net;
 using System.IO;
 using System.IO.Compression;
 using System.Unicode.Builder;
+using System.Text;
 
 namespace System.Unicode.Tests
 {
@@ -61,5 +62,25 @@ namespace System.Unicode.Tests
 				Assert.AreEqual((int)'\t', data.Get('\t').CodePointRange.FirstCodePoint);
 			}
         }
+
+#if DEBUG
+		[TestMethod]
+		public void TestCodePointEncoding()
+		{
+			using (var stream = new MemoryStream(4))
+			using (var writer = new BinaryWriter(stream, Encoding.UTF8, true))
+			using (var reader = new BinaryReader(stream, Encoding.UTF8, true))
+			{
+				for (int i = 0; i <= 0x10FFFF; ++i)
+				{
+					writer.WriteCodePoint(i);
+					writer.Flush();
+					stream.Position = 0;
+					Assert.AreEqual(i, UnicodeData.ReadCodePoint(reader));
+					stream.Position = 0;
+				}
+			}
+		}
+#endif
 	}
 }

UnicodeInformation.Tests/UnicodeInformation.Tests.csproj

@@ -34,6 +34,12 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\System.Unicode.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.IO.Compression" />
@@ -67,6 +73,11 @@
       <Name>UnicodeInformation</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="..\System.Unicode.snk">
+      <Link>System.Unicode.snk</Link>
+    </None>
+  </ItemGroup>
   <Choose>
     <When Condition="'$(VisualStudioVersion)' == '10.0' And '$(IsCodedUITest)' == 'True'">
       <ItemGroup>

UnicodeInformation/Properties/AssemblyInfo.cs

@@ -16,6 +16,9 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyCulture("")]
 [assembly: NeutralResourcesLanguage("en")]
 [assembly: InternalsVisibleTo("UnicodeInformation.Builder, PublicKey=0024000004800000940000000602000000240000525341310004000001000100711da5e71bb2208797ed36597e628c6bf6541b6c157ede943539d19de5104763bd2f42d8c0233ea8fbe7e782d4e2d29c3706a8e8dc1cfa78faabec946a167f7b2b1d396d17a85839ad96f2be930c0efaa893c8b9b6a665bf50ca569b56b9eabf3a69e8274723f85e9d4c3eea1e53dcbbb29a74c78c305e447917daaa6593f1c2")]
+#if DEBUG
+[assembly: InternalsVisibleTo("UnicodeInformation.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100711da5e71bb2208797ed36597e628c6bf6541b6c157ede943539d19de5104763bd2f42d8c0233ea8fbe7e782d4e2d29c3706a8e8dc1cfa78faabec946a167f7b2b1d396d17a85839ad96f2be930c0efaa893c8b9b6a665bf50ca569b56b9eabf3a69e8274723f85e9d4c3eea1e53dcbbb29a74c78c305e447917daaa6593f1c2")]
+#endif
 
 // Version information for an assembly consists of the following four values:
 //

UnicodeInformation/UnicodeData.cs

@@ -87,7 +87,11 @@ namespace System.Unicode
 		//	return reader.ReadByte() | ((reader.ReadByte() | (reader.ReadByte() << 8)) << 8);
 		//}
 
+#if DEBUG
+		internal static int ReadCodePoint(BinaryReader reader)
+#else
 		private static int ReadCodePoint(BinaryReader reader)
+#endif
 		{
 			byte b = reader.ReadByte();