How to use MemoryCache in C# Core Console app? -


i use microsoft.extensions.caching.memory.memorycache in .net core 2.0 console app (actually, in library either used in console or in asp.net app)

i've created test app:

using system;  namespace consoletest {     class program     {         static void main(string[] args)         {             var cache = new microsoft.extensions.caching.memory.memorycache(new microsoft.extensions.caching.memory.memorycacheoptions());              int count = cache.count;             cache.createentry("item1").value = 1;             int count2 = cache.count;             cache.trygetvalue("item1", out object item1);             int count3 = cache.count;             cache.trygetvalue("item2", out object item2);             int count4 = cache.count;              console.writeline("hello world!");         }     } }

unfortunately, not working. items not added cache , can not retrieved.

i suspect need use dependencyinjection, doing this:

using system; using microsoft.extensions.dependencyinjection;  namespace consoletest {     class program     {         static void main(string[] args)         {             var provider = new microsoft.extensions.dependencyinjection.servicecollection()                 .addmemorycache()                 .buildserviceprovider();              //and now?              var cache = new microsoft.extensions.caching.memory.memorycache(new microsoft.extensions.caching.memory.memorycacheoptions());              var xxx = psp.helpers.dependencyinjection.serviceprovider;             int count = cache.count;             cache.createentry("item1").value = 1;             int count2 = cache.count;             cache.trygetvalue("item1", out object item1);             int count3 = cache.count;             cache.trygetvalue("item2", out object item2);             int count4 = cache.count;              console.writeline("hello world!");         }     } }

unfortunately, not working, suspect shouldn't create new memory cache, service provider, haven't been able that.

any ideas?

after configuring provider retrieve cache via getservice extension method

var provider = new servicecollection()                        .addmemorycache()                        .buildserviceprovider();  //and now? var cache = provider.getservice<imemorycache>();  //...other code removed brevity;

from comments:

it's not needed use dependency injection, thing needed disposing return value of createentry(). entry returned createentry needs disposed. on dispose, added cache:

using (var entry = cache.createentry("item2")) {      entry.value = 2;      entry.absoluteexpiration = datetime.utcnow.adddays(1);  }

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