How can you prevent data to be removed from Cache when memory becomes low?

Answer:

Use the DisableMemoryCollection property of the CacheSection class.

// Set the DisableMemoryCollection property to true.

CacheSection.DisableMemoryCollection = true;
we can also set through web.config file
example:
<configuration>
<system.web>
<caching>
<cache disableMemoryCollection="true"/>
</caching>
</system.web>
</configuration>

CacheSection class belongs to System.Web.Configuration name space.