【正文】
security requirements are met, the CLR performs just in time (JIT) pilation to convert the IL code to native machine instructions. The CLR also provides other services related to automatic garbage collection, exception handling, and resource management. Code that is executed by the CLR is sometimes referred to as managed code, in contrast to unmanaged code which is piled into native machine language that targets a specific system. The following diagram illustrates the piletime and runtime relationships of C source code files, the .NET Framework class libraries, assemblies, and the CLR. Language interoperability is a key feature of the .NET Framework. Because the IL code produced by the C piler conforms to the Common Type Specification (CTS), IL code generated from C can interact with code that was generated from the .NET versions of Visual Basic, Visual C++, Visual J, or any of more than 20 other CTSpliant languages. A single assembly may contain multiple modules written in different .NET languages, and the types can reference each other just as if they were written in the same language. In addition to the run time services, the .NET Framework also includes an extensive library of over 4000 classes organized into namespaces that provide a wide variety of useful functionality for everything from file input and output to string manipulation to XML parsing, to Windows Forms controls. The typical C application uses the .NET Framework class library extensively to handle mon plumbing chores. 寧可累死在路上,也不能閑死在家里!寧可去碰壁,也不能面壁。什么是奮斗?奮斗就是每天很難,可一年一年卻越來越容易。能干的人,不在情緒上計較,只在做事上認(rèn)真;無能的人!不在做事上認(rèn)真,只在情緒上計