A user class implementing IPrincipal

User_Principal.cs

public class User : IPrincipal
{
	public  string Name { get; set; }
	public  string EMail { get; set; }
	public  string Phone1 { get; set; }
	public  string Phone2 { get; set; }

	public virtual IEnumerable<Permission> Permissions { get; set; }

	public User()
	{
		Permissions = new List<Permission>();
	}
        public IIdentity Identity{get; set; }
	
	public bool IsInRole(string role)
	{
		if (this.Permissions.Select(p => p.Name.ToLower()).Contains(role.ToLower()))
			return true;
		return false;
	}
}