OData: Generate the EDMX $metadata document from an IEdmModel and print it to the console.

FakeODataResponseMessage.cs

using Microsoft.OData.Core;
using System;
using System.Collections.Generic;
using System.IO;
using System.Web.OData.Builder;

namespace FooApp
{
    class FakeODataResponseMessage : IODataResponseMessage
    {
        public IEnumerable<KeyValuePair<string, string>> Headers
        {
            get
            {
                throw new NotImplementedException();
            }
        }

        public int StatusCode
        {
            get
            {
                throw new NotImplementedException();
            }

            set
            {
                Console.WriteLine(value);
            }
        }

        public string GetHeader(string headerName)
        {
            return null;
        }

        public Stream GetStream()
        {
            return Console.OpenStandardOutput();
        }

        public void SetHeader(string headerName, string headerValue)
        {
            Console.WriteLine(headerName + ": " + headerValue);
        }
    }
}

Program.cs

using Microsoft.OData.Core;
using System;
using System.Collections.Generic;
using System.IO;
using System.Web.OData.Builder;

namespace FooApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var builder = new ODataConventionModelBuilder();

            // TODO: Define OData model

            var edmModel = builder.GetEdmModel();

            var writerSettings = new ODataMessageWriterSettings()
            {
                Indent = true,
            };

            using (var msgWriter = new ODataMessageWriter(
                new FakeODataResponseMessage(),
                writerSettings,
                edmModel))
            {
                msgWriter.WriteMetadataDocument();
            }
        }
    }
}