net-boot-server/DhcpServer/Utils/ExtensionMethods.cs

using System;
using System.Collections.Generic;

namespace DhcpServer.Utils
{
    internal static class ExtensionMethods
    {
        public static TR MapValue<TK, TV, TR>(this Dictionary<TK, TV> dic, TK key, Func<TV, TR> found)
        {
            return dic.TryGetValue(key, out var value)
                ? found(value)
                : default;
        }

        public static TR MapValue<TK, TV, TR>(this Dictionary<TK, TV> dic, TK key, Func<TV, TR> found, Func<TR> notFound)
        {
            return dic.TryGetValue(key, out var value)
                ? found(value)
                : notFound();
        }
    }
}