Simple extension to make it easier to use Redis Caching and StackExchange.Redis package

RedisExtensions.cs

using System;
using StackExchange.Redis;

namespace ConsoleApplication1
{
    public static class RedisExtensions
    {
        public static RedisValue Get(this IDatabase db, RedisKey key, Func<RedisValue> loadFunc, TimeSpan slidingDuration)
        {
            var ret = db.StringGet(key);
            if (!ret.HasValue)
            {
                ret = loadFunc();
                db.Set(key, ret, slidingDuration);
            }
            else
            {
                // sliding expiration
                db.KeyExpire(key, slidingDuration, CommandFlags.FireAndForget);
            }

            return ret;
        }

        public static void Set(this IDatabase db, RedisKey key, RedisValue newValue, TimeSpan slidingDuration)
        {
            db.StringSet(key, newValue, slidingDuration, When.Always, CommandFlags.FireAndForget);
        }
    }
}