Priorities are hints that can optimize cache scavenging. Essentially, if the ASP.NET engine decides to remove cache items because memory is scarce, it will remove items with a lower priority cost first. The CacheItemPriority enumeration also includes a NotRemovable member that you can use to prevent ASP.NET from removing an object from the cache automatically when memory is low.

public enum CacheItemPriority {
   Low = 1,
   BelowNormal = 2,
   Normal = 3,
   Default = 3,
   AboveNormal = 4,
   High = 5,
   NotRemovable = 6
}

Hierarchy

System.Object System.ValueType System.Enum(System.IComparable, System.IFormattable, System.IConvertible) CacheItemPriority

Passed To

Cache.{Add( ), Insert( )}