ServiceStack ICacheClient Increment not working - memcached

Question

I have a problem with ServiceStack.CacheAccess.Memcached.MemcachedClientCache.
The Increment method does not work as expected.
For the test, I am using a regular console app and the ICacheClient interface.
According to the method documentation :
The item must be inserted into the cache before it can be changed.
The item must be inserted as a System.String.
The operation only works with System.UInt32values, so -1 always indicates that the item was not found.
So here we go:
ICacheClient client = new MemcachedClientCache();
string key = "test";
bool result = client.Remove(key);
Console.WriteLine("{0} removed: {1}", key, result);
//The item must be inserted as a System.String.
result = client.Add(key, "1");
Console.WriteLine("added {0}", result);
long v = client.Increment(key, 1);
Console.WriteLine("first increment : {0}", v);
string o = client.Get<string>(key);
Console.WriteLine("first read: {0}", o);
v = client.Increment(key, 1);
Console.WriteLine("second increment: {0}", v);
o = client.Get<string>(key);
Console.WriteLine("second read: {0}", o);
The result :
test removed: True
added True
first increment : 0
first read: 1
second increment: 0
second read: 1
As you can see, increment does not works.
The config for enyim:
<enyim.com>
<memcached protocol="Binary">
<servers>
<!-- make sure you use the same ordering of nodes in every configuration you have -->
<add address="memcached-dev1"
port="11211" />
</servers>
<socketPool minPoolSize="10"
maxPoolSize="100"
connectionTimeout="00:00:10"
deadTimeout="00:02:00" />
</memcached>
</enyim.com>
Did I missed something ?

Answer 1

You can not read the value of a counter in this manner, there is an explanation of why in one of the closed issues of the Enyim project (here). Instead just increment the counter by 0.
var v = cacheClient.Increment(key, 0);