方法一 使用：ServiceStack.Redis

在ip:port前面加上@用来表示密码，比如password@ip:port 

<add key="RedisServer" value="123456@127.0.0.1:6379"/>

方法二使用：StackExchange.Redis

var configurationOptions = new ConfigurationOptions
{
EndPoints =
{
"127.0.0.1", "6379"
},
KeepAlive = 180,
Password = "",
DefaultVersion = new Version("2.8.5"),
// Needed for cache clear
AllowAdmin = true
};

ConnectionMultiplexer redis = ConnectionMultiplexer.Connect(configurationOptions);

https://www.cnblogs.com/weifeng123/p/12100324.html

https://www.cnblogs.com/shuaimeng/p/11017402.html