程序集： Microsoft.ServiceBus（在 Microsoft.ServiceBus.dll 中）
The provides an efficient shortcut for declarations of filters that deal only with correlation equality. In this case the cost of the lexicographical analysis of the expression can be avoided. Not only will correlation filters be optimized at declaration time, but they will also be optimized at runtime. Correlation filter matching can be reduced to a hashtable lookup, which aggregates the complexity of the set of defined correlation filters to 0(1).