PLINQ is a query execution engine that accepts any LINQ-to-Objects or LINQ-to-XML query and automatically utilizes multiple processors or cores for execution when they are available. From the below diagram, the scheme can be seen that any program written by a .NET developer and using parallel algorithms uses three modules of the .NET Framework. Here the PLINQ Execution Engineer is the mechanism for high-level parallel data processing, which is implemented over Task Parallel Library. It should be noted here that a Task Parallel Library is a high-level library of parallel tasks built over the previous module. All elements of the data structure are contained in the System. The threading namespace and can be divided into several groups: synchronization primitives, tools for operating System's threads, atomic operations, and others.