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    <p>Since I haven't got any good answers, I came up with this solution (BTW thanks @Simon and @Alex for your answers!).</p> <p>I want to share it with all of the community as a reference. Of course, any corrections will be highly appreciated.</p> <pre><code>using System; using System.Net.Sockets; using BookSleeve; namespace Redis { public sealed class RedisConnectionGateway { private const string RedisConnectionFailed = "Redis connection failed."; private RedisConnection _connection; private static volatile RedisConnectionGateway _instance; private static object syncLock = new object(); private static object syncConnectionLock = new object(); public static RedisConnectionGateway Current { get { if (_instance == null) { lock (syncLock) { if (_instance == null) { _instance = new RedisConnectionGateway(); } } } return _instance; } } private RedisConnectionGateway() { _connection = getNewConnection(); } private static RedisConnection getNewConnection() { return new RedisConnection("127.0.0.1" /* change with config value of course */, syncTimeout: 5000, ioTimeout: 5000); } public RedisConnection GetConnection() { lock (syncConnectionLock) { if (_connection == null) _connection = getNewConnection(); if (_connection.State == RedisConnectionBase.ConnectionState.Opening) return _connection; if (_connection.State == RedisConnectionBase.ConnectionState.Closing || _connection.State == RedisConnectionBase.ConnectionState.Closed) { try { _connection = getNewConnection(); } catch (Exception ex) { throw new Exception(RedisConnectionFailed, ex); } } if (_connection.State == RedisConnectionBase.ConnectionState.Shiny) { try { var openAsync = _connection.Open(); _connection.Wait(openAsync); } catch (SocketException ex) { throw new Exception(RedisConnectionFailed, ex); } } return _connection; } } } } </code></pre>
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    1. COYou're code is doing the double-check locking thing which is [actually broken](http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html) (at least on the Java platform, but I'd doubt the C# environment is radically different)
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    2. CO@AlexPopescu, the .Net CLR resolves issues related to using _Double-Check Locking_ that are common in other environments. Please see: http://msdn.microsoft.com/en-us/library/ff650316.aspx . But thanks to your comment, I noticed I should add the _volatile_ keyword to __instance_. Thanks!
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    3. COI was trying out your solution and on average it's 120ms slower than my bad hack of just returning a new connection each time. http://pastie.org/3965493. Are you using this code today or have you done any modifications on it?
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      1. USBjarki Heiðar
 

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