Redis

1.Connect to redis.

static void RedisDemo()
        {
            using (var redis = ConnectionMultiplexer.Connect("localhost"))
            {
                IDatabase db = redis.GetDatabase(2);
                for(int i=0;i<100000;i++)
                { 
                    string redisKey = Guid.NewGuid().ToString();                    
                    db.StringSet(redisKey, redisKey);
                }   
            }
        }

2.StackExchange.Redis.RedisCommandException: 'This operation is not available unless admin mode is enabled: FLUSHDB'

ConnectionMultiplexer redis= ConnectionMultiplexer.Connect("localhost,allowAdmin=true")

3.Flush redis DB.

 //dbIndex is between 0 and 15
        static void FlushRedisDbs(int dbIndex)
        {
            using(ConnectionMultiplexer redis= ConnectionMultiplexer.Connect("localhost,allowAdmin=true"))
            {
                var server = redis.GetServer("localhost:6379");
                server.FlushDatabase(dbIndex);
            }
        }