Introducing IHtmlContent - an interface which lets any content define how to write itself.

HttpAbstractions.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 14
-VisualStudioVersion = 14.0.22823.1
+VisualStudioVersion = 14.0.23017.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{A5A15F1C-885A-452A-A731-B0173DDBD913}"
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@@ -43,6 +43,8 @@ Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Microsoft.Framework.WebEnco
 EndProject
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 EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Microsoft.AspNet.Html.Abstractions", "src\Microsoft.AspNet.Html.Abstractions\Microsoft.AspNet.Html.Abstractions.xproj", "{68A28E4A-3ADE-4187-9625-4FF185887CB3}"
+EndProject
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 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -243,6 +245,18 @@ Global
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 		{BE9112CB-D87D-4080-9CC3-24492D49CBE6}.Release|x86.Build.0 = Release|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Debug|x86.Build.0 = Debug|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Release|x86.ActiveCfg = Release|Any CPU
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -266,5 +280,6 @@ Global
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 		{BE9112CB-D87D-4080-9CC3-24492D49CBE6} = {A5A15F1C-885A-452A-A731-B0173DDBD913}
+		{68A28E4A-3ADE-4187-9625-4FF185887CB3} = {A5A15F1C-885A-452A-A731-B0173DDBD913}
 	EndGlobalSection
 EndGlobal

src/Microsoft.AspNet.Html.Abstractions/IHtmlContent.cs

@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.IO;
+using Microsoft.Framework.WebEncoders;
+
+namespace Microsoft.AspNet.Html.Abstractions
+{
+    /// <summary>
+    /// HTML content which can be written to a TextWriter.
+    /// </summary>
+    public interface IHtmlContent
+    {
+        /// <summary>
+        /// Writes the content by encoding it with the specified <paramref name="encoder"/>
+        /// to the specified <paramref name="writer"/>.
+        /// </summary>
+        /// <param name="writer">The <see cref="TextWriter"/> to which the content is written.</param>
+        /// <param name="encoder">The <see cref="IHtmlEncoder"/> which encodes the content to be written.</param>
+        void WriteTo(TextWriter writer, IHtmlEncoder encoder);
+    }
+}

src/Microsoft.AspNet.Html.Abstractions/Microsoft.AspNet.Html.Abstractions.xproj

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>68a28e4a-3ade-4187-9625-4ff185887cb3</ProjectGuid>
+    <RootNamespace>Microsoft.AspNet.Html.Abstractions</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>

src/Microsoft.AspNet.Html.Abstractions/project.json

@@ -0,0 +1,16 @@
+{
+    "version": "1.0.0-*",
+    "description": "ASP.NET 5 HTML content interface.",
+    "repository": {
+        "type": "git",
+        "url": "git://github.com/aspnet/httpabstractions"
+    },
+    "dependencies": {
+        "Microsoft.Framework.WebEncoders.Core": "1.0.0-*"
+    },
+    "frameworks": {
+        "net45" : { },
+        "dnx451": { },
+        "dnxcore50": { }
+    }
+}