要不要改成.net3.0吧呀

From a Programmer's point of view, .NET can be understood as a runtime environment and a comprehensive base class library. The runtime layer is properly referred to as the common language runtime, or CLR. The primary role of the CLR is to locate, load, and manage .NET types on your behalf. The CLR also takes care of a number of low-level details such as memory management; creating application domains, threads, and object context boundaries; and performing various security checks.Another building block of the .NET platform is the Common Type Sstem, or CTS. The CTS specification fully describes all possible data types and programming constructs supported by the runtime, specifies how these entities can interact with each other, and details how they are represented in the .NET metadata format.Understand the a given .NET-aware language might not support each and every feature defined by the CTS. The Common Language Specification(CLS)is a related specification that defines a subset of common types and programming construsts that all .NET programming languages can agree on. Thus, if you build .NET types that only expose CLS-compliant features, you can rest assured that all .NET-aware languages can consume them. Conversely, if you make use of a data type of programming construct that is outside of the bounds the CLS, you cannot guarantee that every .NET programming language can interact with your .NET code library.