octokit.net/Octokit/Clients/RepositoryContentsClient.cs

using System.Threading.Tasks;

namespace Octokit
{
    public class RepositoryContentsClient : ApiClient, IRepositoryContentsClient
    {
        public RepositoryContentsClient(IApiConnection apiConnection) : base(apiConnection)
        {
        }

        /// <summary>
        /// Gets the preferred README for the specified repository.
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/repos/contents/#get-the-readme">API documentation</a> for more information.
        /// </remarks>
        /// <param name="owner">The owner of the repository</param>
        /// <param name="name">The name of the repository</param>
        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
        /// <returns></returns>
        public async Task<Readme> GetReadme(string owner, string name)
        {
            Ensure.ArgumentNotNullOrEmptyString(owner, "owner");
            Ensure.ArgumentNotNullOrEmptyString(name, "name");

            var endpoint = ApiUrls.RepositoryReadme(owner, name);
            var readmeInfo = await ApiConnection.Get<ReadmeResponse>(endpoint, null).ConfigureAwait(false);
            
            return new Readme(readmeInfo, ApiConnection);
        }

        /// <summary>
        /// Gets the perferred README's HTML for the specified repository.
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/repos/contents/#get-the-readme">API documentation</a> for more information.
        /// </remarks>
        /// <param name="owner">The owner of the repository</param>
        /// <param name="name">The name of the repository</param>
        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
        /// <returns></returns>
        public Task<string> GetReadmeHtml(string owner, string name)
        {
            Ensure.ArgumentNotNullOrEmptyString(owner, "owner");
            Ensure.ArgumentNotNullOrEmptyString(name, "name");

            return ApiConnection.GetHtml(ApiUrls.RepositoryReadme(owner, name), null);
        }
    }
}