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+
+
 [![Build status](https://ci.appveyor.com/api/projects/status/capxc7p5cvyrq21w/branch/master?svg=true)](https://ci.appveyor.com/project/MicrosoftOpenAPINETAdmin/openapi-net-csharpcomment/branch/master)
 
-# Contributing
+![C# Annotation Document Generator](docs/images/banner.png "Convert /// C# Comments --> OpenAPI.NET")
 
+# C# Annotation Component for OpenAPI.NET [Preview]
+[Disclaimer: This repository is in a preview state. Expect to see some iterating as we work towards the final release candidate slated for mid 2018. Feedback is welcome!]
+
+
+### Welcome!
+This component is the first by-product of Microsoft's supported base [OpenAPI.NET](http://aka.ms/openapi) object model. The module is designed to convert your native annotation XML from your API code into a OpenAPI document object. All you need to do is follow a simple annotation schema for your API controller comments, and you automatically get all the benefits of the OpenAPI and its related Swagger tooling.
+
+### Annotations (C# Comments)
+We've made an effort to develop an annotation model that maps very closely to the native .Net comment structure for the C# language. In general, the below image describes the general concept of how this utility can parse your annotation XML and generate your OpenAPI.NET document.
+![Convert Comments to OpenAPI](docs/images/comment-oai-map.png "Map /// C# Comments --> OpenAPI.NET")
+
+Consult our [WIKI](https://github.com/Microsoft/OpenAPI.NET.CSharpComment/wiki) for specific guidance and examples on how to annotate your controllers.
+
+### Mechanics
+The items needed to use this component as shown in the sample below.
+- The "XML documentation file(s)" from your MSBuild.exe output. (List<string>)
+- Any DLL's that contain the data types of your API's request/response contracts. (List<string>)
+- OpenAPI Document Version (string)
+- Filterset Version (enum)
+
+After you've correctly annotated your C# code, you'll need to build your solution and then retrieve the output XML file where MSBuild.exe aggregates the projects comments. This file is what this utility will use to convert your comments into an OpenAPI.NET object.
+![Enable Comment Output](docs/images/vs-enable.png "Output comments from MSBuild.exe")
+
+### Simple Example Code
+Here's a simple exampled of how you'd use this component. The utility takes in two lists. The first shown below is the paths to your post-MSbuild.exe xml documentation files. The second being the paths to any DLL's that have classes that you reference in those XML comments.
+
+For example, if you have an annotation for a response type as follows:
+```
+/// <response code="200"><see cref="SampleObject1"/>Sample object retrieved</response>
+```
+You'd need to include the path to the .dll that contains the SampleObject1 class. 
+
+Generating your OAI document should look something like this:
+```
+var input = new OpenApiGeneratorConfig(
+    annotationXmlDocuments: new List<XDocument>()
+    {
+        XDocument.Load(@"C:\TestData\Annotation.xml"),
+        XDocument.Load(@"C:\TestData\Contracts.xml"),
+    },
+    assemblyPaths: new List<string>()
+    {
+        @"C:\TestData\Service.dll",
+        @"C:\TestData\Contract.dll"
+    },
+    openApiDocumentVersion: "V1",
+    filterSetVersion: FilterSetVersion.V1
+);
+
+GenerationDiagnostic result;
+
+var generator = new OpenApiGenerator();
+
+IDictionary<DocumentVariantInfo,OpenApiDocument> openApiDocuments =   generator.GenerateDocuments(
+    openApiGeneratorConfig: input,
+    generationDiagnostic: out result
+);
+```
+In this example the generated should contain a valid OpenAPI.NET document for your API based on the annotation XML and contract dll's you included.
+
+# Contributing
 This project welcomes contributions and suggestions.  Most contributions require you to agree to a
 Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
 the rights to use your contribution. For details, visit https://cla.microsoft.com.
@@ -12,4 +75,4 @@ provided by the bot. You will only need to do this once across all repos using o
 
 This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
 For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
-contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
+contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
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