RequestCachePolicy.cs

namespace System.Net.Cache
{
    public class RequestCachePolicy
    {
        private RequestCacheLevel m_Level;

        public RequestCacheLevel Level => m_Level;

        public RequestCachePolicy()
            : this(RequestCacheLevel.Default)
        {
        }

        public RequestCachePolicy(RequestCacheLevel level)
        {
            if (level < RequestCacheLevel.Default || level > RequestCacheLevel.NoCacheNoStore)
            {
                throw new ArgumentOutOfRangeException("level");
            }
            m_Level = level;
        }

        public override string ToString()
        {
            return "Level:" + m_Level.ToString();
        }
    }
}