/// <summary>
/// Initializes a new instance of the <see cref="SprintUser"/> class for the given user, sprint and role.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="sprint">The sprint.</param>
/// <param name="role">The role.</param>
public SprintUser(User user, Sprint sprint, SprintRole role)
{
if (user == null)
throw new ArgumentNullException("user", "The user can not be null.");
if (sprint == null)
throw new ArgumentNullException("sprint", "The sprint can not be null.");
user.AddSprintUser(this);
sprint.AddSprintUser(this);
this.sprintRole = role;
}