恩!我知道了,不过我运行 csc welcome.cs 时怎么报
D:\mytest\mytest>csc Welcome.cs
Microsoft (R) Visual C# .NET Compiler version 7.10.3052.4
for Microsoft (R) .NET Framework version 1.1.4322
Copyright (C) Microsoft Corporation 2001-2002. All rights reserved.
error CS5001: Program 'd:\mytest\mytest\Welcome.exe' does not have an entry
point defined