octokit.net/Octokit/Models/Request/IssueUpdate.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using Octokit.Internal;

namespace Octokit
{
    /// <summary>
    /// Specifies the values used to update an issue.
    /// </summary>
    [DebuggerDisplay("{DebuggerDisplay,nq}")]
    public class IssueUpdate
    {
        /// <summary>
        /// Title of the issue (required)
        /// </summary>
        public string Title { get; set; }

        /// <summary>
        /// Details about the issue.
        /// </summary>
        public string Body { get; set; }

        /// <summary>
        /// Login for the user that this issue should be assigned to.
        /// </summary>
        /// <remarks>
        /// Only users with push access can set the assignee for new issues. The assignee is silently dropped otherwise.
        /// </remarks>
        [SerializeNull]
        public string Assignee { get; set; }

        /// <summary>
        /// Milestone to associate this issue with.
        /// </summary>
        /// <remarks>
        /// Only users with push access can set the milestone for new issues. The milestone is silently dropped
        /// otherwise
        /// </remarks>
        [SerializeNull]
        public int? Milestone { get; set; }

        /// <summary>
        /// Labels to associate with this issue.
        /// </summary>
        /// <remarks>
        /// Only users with push access can set labels for new issues. Labels are silently dropped otherwise.
        /// </remarks>
        public ICollection<string> Labels { get; private set; }

        /// <summary>
        /// Whether the issue is open or closed.
        /// </summary>
        public ItemState? State { get; set; }

        internal string DebuggerDisplay
        {
            get
            {
                return string.Format(CultureInfo.InvariantCulture, "Title: {0}", Title);
            }
        }

        /// <summary>
        /// Adds the specified label to the issue.
        /// </summary>
        /// <param name="name">The name of the label.</param>
        public void AddLabel(string name)
        {
            // lazily create the label array
            if (Labels == null)
            {
                Labels = new List<string>();
            }

            Labels.Add(name);
        }

        /// <summary>
        /// Clears all the labels.
        /// </summary>
        public void ClearLabels()
        {
            // lazily create the label array
            if (Labels == null)
            {
                Labels = new List<string>();
            }
            else
            {
                Labels.Clear();
            }
        }
    }
}