Visual C#2008版 应用案例教程

Visual C#（2008版） 应用案例教程，程序源代码，案例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace EX2_1
{
    class Program
    {
        static void Main（string[] args）
        {
            Console.WriteLine（“请输入圆的半径“）;
            string r= Console.ReadLine（）;
            double IntR = Convert.ToDouble（r）;
            const double PI=3.1415926;
            Console.WriteLine（PI*IntR*IntR）;
        }
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       4608  2009-09-09 09:46  CH02\EX2_1\EX2_1\bin\Debug\EX2_1.exe

     文件      13824  2009-09-09 09:46  CH02\EX2_1\EX2_1\bin\Debug\EX2_1.pdb

     文件      14328  2009-11-24 14:47  CH02\EX2_1\EX2_1\bin\Debug\EX2_1.vshost.exe

     文件        490  2007-07-21 01:33  CH02\EX2_1\EX2_1\bin\Debug\EX2_1.vshost.exe.manifest

     文件       2483  2009-07-16 11:18  CH02\EX2_1\EX2_1\EX2_1.csproj

     文件        859  2009-11-24 14:47  CH02\EX2_1\EX2_1\obj\Debug\EX2_1.csproj.FileListAbsolute.txt

     文件       4608  2009-09-09 09:46  CH02\EX2_1\EX2_1\obj\Debug\EX2_1.exe

     文件      13824  2009-09-09 09:46  CH02\EX2_1\EX2_1\obj\Debug\EX2_1.pdb

     文件        448  2009-09-09 09:46  CH02\EX2_1\EX2_1\Program.cs

     文件       1366  2009-07-16 11:18  CH02\EX2_1\EX2_1\Properties\AssemblyInfo.cs

     文件        905  2009-07-16 11:18  CH02\EX2_1\EX2_1.sln

    ..A..H.     13312  2009-11-24 14:48  CH02\EX2_1\EX2_1.suo

     文件       5120  2009-08-06 11:15  CH02\EX2_10\EX2_10\bin\Debug\EX2_10.exe

     文件      13824  2009-08-06 11:15  CH02\EX2_10\EX2_10\bin\Debug\EX2_10.pdb

     文件      14328  2009-08-06 14:21  CH02\EX2_10\EX2_10\bin\Debug\EX2_10.vshost.exe

     文件        490  2007-07-21 01:33  CH02\EX2_10\EX2_10\bin\Debug\EX2_10.vshost.exe.manifest

     文件       2485  2009-07-22 13:54  CH02\EX2_10\EX2_10\EX2_10.csproj

     文件        463  2009-08-06 14:21  CH02\EX2_10\EX2_10\obj\Debug\EX2_10.csproj.FileListAbsolute.txt

     文件       5120  2009-08-06 11:15  CH02\EX2_10\EX2_10\obj\Debug\EX2_10.exe

     文件      13824  2009-08-06 11:15  CH02\EX2_10\EX2_10\obj\Debug\EX2_10.pdb

     文件       2213  2009-07-28 08:43  CH02\EX2_10\EX2_10\Program.cs

     文件       1368  2009-07-22 13:54  CH02\EX2_10\EX2_10\Properties\AssemblyInfo.cs

     文件        908  2009-07-22 13:54  CH02\EX2_10\EX2_10.sln

    ..A..H.     13824  2009-08-06 14:22  CH02\EX2_10\EX2_10.suo

     文件       5120  2009-07-17 17:19  CH02\EX2_2\EX2_2\bin\Debug\EX2_2.exe

     文件      13824  2009-07-17 17:19  CH02\EX2_2\EX2_2\bin\Debug\EX2_2.pdb

     文件      14328  2009-07-17 14:18  CH02\EX2_2\EX2_2\bin\Debug\EX2_2.vshost.exe

     文件        490  2007-07-21 01:33  CH02\EX2_2\EX2_2\bin\Debug\EX2_2.vshost.exe.manifest

     文件       2483  2009-07-17 14:18  CH02\EX2_2\EX2_2\EX2_2.csproj

     文件        231  2009-07-17 15:50  CH02\EX2_2\EX2_2\obj\Debug\EX2_2.csproj.FileListAbsolute.txt

............此处省略2243个文件信息