Retrieve <caching> element from web.config - configuration

Question

I've been trying to get the caching element from my web.config but have thus far failed.
When using this code:
Configuration conf = WebConfigurationManager.OpenWebConfiguration(System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath);
I am able to get at the web.configh file.
When i use
conf.GetSection("system.web/membership");
I succefuly get the membership section.
When i use
conf.GetSection("system.web/caching");
I get null.
Any ideas ?
part of the web.config below:
<system.web>
<caching>
<sqlCacheDependency enabled="true" pollTime="1000">
<databases>
<clear />
<add name="Tests" pollTime="1000" connectionStringName="TestsConnectionString"/>
</databases>
</sqlCacheDependency>
</caching>
<authentication mode="Forms">
<forms loginUrl="~/Account/Login.aspx" timeout="2880"/>
</authentication>
<membership>
<providers>
<clear/>
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>
</providers>
</membership>
....

Answer 1

Have you casted the return type correctly as OutputCacheSection?
const string outputCacheKey = "system.web/caching/outputCache";
var outputCacheSection = ConfigurationManager.GetSection(outputCacheKey) as OutputCacheSection;
Now say you wanted to get an attribute named connectionString within the first provider node e.g.
<caching>
<outputCache enableOutputCache="true" defaultProvider="MyRedisOutputCache">
<providers>
<add name="MyRedisOutputCache" connectionString="myapp.redis.cache.windows.net:6380,password=hellopassword,ssl=True,abortConnect=False" type="Microsoft.Web.Redis.RedisOutputCacheProvider,Microsoft.Web.RedisOutputCacheProvider" />
</providers>
</outputCache>
</caching>
you could do something like this
string defaultProviderName = outputCacheSection.DefaultProviderName;
ProviderSettings ps = outputCacheSection.Providers[defaultProviderName];
var cs = ps.Parameters["connectionString"];