public class CSV 
{
	public static string[] GetCSV(string s)
	{
		ArrayList a = new ArrayList();
		int i = 0, j;
		while (i < s.Length) {
			bool b = s[i] == '"';
			if (b) ++i;
			j = s.IndexOf(b ? '"' : ',', i);
			if (j < 0) j = s.Length;
			a.Add(s.Substring(i,j-i));
			i = j + (b?2:1);
		}
		return (string[])a.ToArray(Type.GetType("System.String"));
	}
}

using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;
/// <summary>
/// Zipによる圧縮と解凍
/// </summary>
public class ZipUtil 
{
	/// <summary>
	/// 圧縮
	/// </summary>
	/// <param name="outFile">作成するZIPファイル名</param>
	/// <param name="files">入力ファイル</param>
	/// <param name="level">圧縮レベル(0:無圧縮-9:高圧縮)</param>
	public static void Compress(string outFile,ArrayList files,int level)
	{
		Crc32 crc = new Crc32();
		ZipOutputStream zos = new ZipOutputStream(File.Create(outFile));
		zos.SetLevel(level);
		foreach (string fnam in files) 
		{
			FileStream fs = File.OpenRead(fnam);
			byte[] buf = new byte[fs.Length];
			fs.Read(buf,0,buf.Length);
			ZipEntry ze = new ZipEntry(fnam);
			ze.DateTime = DateTime.Now;
			ze.Size = fs.Length;
			fs.Close();
			crc.Reset();
			crc.Update(buf);
			ze.Crc  = crc.Value;
			zos.PutNextEntry(ze);
			zos.Write(buf,0,buf.Length);
		}
		zos.Finish();
		zos.Close();
	}
	/// <summary>
	/// 解凍
	/// </summary>
	/// <param name="inFile">読込むZIPファイル名</param>
	/// <param name="files">解凍されたファイル(nullも可)</param>
	public static void Decompress(string inFile,ArrayList files)
	{
		int sz;
		byte[] dt = new byte[4096];
		ZipEntry ze;
		ZipInputStream zis = new ZipInputStream(File.OpenRead(inFile));
		if (files != null) files.Clear();
		while ((ze = zis.GetNextEntry()) != null) 
		{
			if (files != null) files.Add(ze.Name);
			Directory.CreateDirectory(Path.GetDirectoryName(ze.Name));
			FileStream fs = File.Create(ze.Name);
			while ((sz = zis.Read(dt,0,dt.Length)) > 0) fs.Write(dt,0,sz);
			fs.Close();
		}
		zis.Close();
	}
}

using System;
using System.IO;
using System.Reflection;
using System.Threading;

namespace OfficeGrep
{
	/// <summary>
	/// OfficeGrep : Excel,Word,PowerPointの中から文字検索を行う。
	/// </summary>
	class Class1
	{
		static string[] Args = null;
		/// <summary>
		/// アプリケーションのメイン エントリ ポイントです。
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			if (args.Length < 1) 
			{
				Console.Error.WriteLine(
		"usage : OfficeGrep SearchString [file or directory...]");
				return;
			}
			Args = args;
			Thread th = new Thread(new ThreadStart(Do));
			th.Start();
			th.Join();
			th = null;
			GC.Collect();
		}
		static void Do()
		{
			Excel.Application appe = null;
			Word.Application appw = null;
			PowerPoint.Application appp = null;
			try 
			{
				if (Args.Length == 1) FindDirectory(Args[0],".",ref appe,ref appw,ref appp);
				else for (int i=1;i<Args.Length;++i) Find(Args[0],Args[i],ref appe,ref appw,ref appp);
			}
			finally 
			{
				object mv = Missing.Value;
				if (appe != null) { appe.Quit(); }
				if (appw != null) { appw.Quit(ref mv,ref mv,ref mv); }
				if (appp != null) { appp.Quit(); }
			}
		}
		static void Find(string wd,string obj,
			ref Excel.Application appe,ref Word.Application appw,ref PowerPoint.Application appp)
		{
			if (File.Exists(obj)) 
				FindFile(wd,obj,ref appe,ref appw,ref appp);
			else FindDirectory(wd,obj,ref appe,ref appw,ref appp);
		}
		static void FindDirectory(string wd,string dir,
			ref Excel.Application appe,ref Word.Application appw,ref PowerPoint.Application appp)
		{
			string[] ss = Directory.GetFiles(dir);
			foreach (string s in ss) FindFile(wd,s,ref appe,ref appw,ref appp);
		}
		static void Check(string fnam)
		{
			Console.WriteLine(fnam);
		}
		static void FindFile(string SearchWord,string FileName,
			ref Excel.Application appe,ref Word.Application appw,ref PowerPoint.Application appp)
		{
			object mv = Missing.Value;
			string fulnam = Environment.CurrentDirectory + "\\" + FileName;
			object ofnam = fulnam;
			object owd = SearchWord;
			string s = FileName.ToLower().Substring(FileName.Length-4);
			if (s == ".xls" || s == ".xlt") 
			{
				if (appe == null) appe = new Excel.Application();
				Excel.Workbook wb = appe.Workbooks.Open(fulnam,
					mv,mv,mv,mv,mv,mv,mv,mv,mv,mv,mv,mv);
				foreach (Excel.Worksheet ws in wb.Sheets) 
				{
					if (ws.Cells.Find(owd,mv,mv,mv,mv,Excel.XlSearchDirection.xlNext,mv,mv) != null)
					{
						Check(FileName);
						break;
					}
				}
				wb.Close(mv,mv,mv);
				wb = null;
			} 
			else if (s == ".doc") 
			{
				if (appw == null) appw = new Word.Application();
				Word.Document doc = appw.Documents.Open(ref ofnam,
					ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,ref mv);
				Word.Find f = doc.Content.Find;
				if (f.Execute(ref owd,
					ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,
					ref mv,ref mv,ref mv,ref mv,ref mv,ref mv,ref mv))
					Check(FileName);
				doc.Close(ref mv,ref mv,ref mv);
			} 
			else if (s == ".ppt" || s == ".pps") 
			{
				/*
				if (appp == null) appp = new PowerPoint.Application();
				PowerPoint.Presentation prs = appp.Presentations.Open(fulnam,
					Office.MsoTriState.msoTrue,Office.MsoTriState.msoFalse,
					Office.MsoTriState.msoFalse);
				Console.WriteLine(prs.Name);
				foreach (PowerPoint.Slide sl in prs.Slides) 
				{
				}
				prs.Close();
				*/
			} 
			else 
			{
				StreamReader sr = new StreamReader(fulnam,System.Text.Encoding.Default);
				string st = sr.ReadToEnd();
				if (st.IndexOf(SearchWord) >= 0)
					Check(FileName);
				sr.Close();
			}
		}
	}
}

namespace Utility 
{
	public class CheckMessage
	{
		private class MessageFilter : IMessageFilter 
		{
			public Message		msg;
			public bool PreFilterMessage(ref Message m) 
			{
				//Trace.WriteLine(m);
				if (m.Msg == 0x200 || m.Msg == 0x202) 
				{
					msg = m;
					return true;
				}
				return false;
			}
		}
		/// <summary>
		/// MouseMoveまたはMouseUpになるまでメッセージを処理する
		/// </summary>
		/// <param name="fm">呼び出し側のForm</param>
		/// <param name="e">MouseDownの引数。結果が入る。Clicks&4でShift、&8でCtrlの判別。</param>
		/// <returns>MouseMove中かどうか</returns>
		public static bool CheckMove(Form fm, ref System.Windows.Forms.MouseEventArgs e)
		{
			if (e.Button == MouseButtons.Right) return false;
			MessageFilter mf = new MessageFilter();
			Application.AddMessageFilter(mf);
			do Application.DoEvents();
			while (mf.msg.Msg != 0x200 && mf.msg.Msg != 0x202);
			Application.RemoveMessageFilter(mf);
			int		l = mf.msg.LParam.ToInt32(), w = mf.msg.WParam.ToInt32();
			e = new MouseEventArgs(MouseButtons.None,w, (l<<16)>>16, l>>16,0);
			if (mf.msg.Msg != 0x202) return true;
			fm.Capture = false;
			return false;
		}
	}
}

		private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			int		x = e.X, y = e.Y, prex = x,prey = y;
			Graphics g = CreateGraphics();
			while (CheckMessage.CheckMove(this,ref e)) 
			{
				g.DrawLine(Pens.LightGray,x,y,prex,prey);
				g.DrawLine(Pens.Black,x,y,prex = e.X,prey = e.Y);
				Trace.WriteLine("X = " + e.X + "  Y = " + e.Y);
			}
			Trace.WriteLine("Up");
			g.Dispose();
		}

C#
namespace Utility
{
	public class CSV 
	{
		public static string[] GetCSV(string s)
		{
			ArrayList a = new ArrayList();
			int i = 0, j;
			string t;
			StringBuilder h = new StringBuilder();
			while (i < s.Length) 
			{
				bool b = s[i] == '"';
				if (b) ++i;
				j = s.IndexOf(b ? '"' : ',', i);
				if (j < 0) j = s.Length;
				t = s.Substring(i,j-i);
				if (b && j < s.Length-1 && s[j+1] == '"') 
				{
					h.Append(t);
					h.Append('"');
					i = j+1;
				} 
				else 
				{
					a.Add(h + t);
					h.Length = 0;
					i = j + (b?2:1);
				}
			}
			return (string[])a.ToArray(Type.GetType("System.String"));
		}
	}
}

VB.NET
Namespace Utility
    Public Class CSV
        Public Shared Function GetCSV(ByVal s As String) As String()
            Dim a As ArrayList = New ArrayList()
            Dim i As Integer = 0, j As Integer
            Dim t As String
            Dim h As StringBuilder = New StringBuilder()
            While (i < s.Length)
                Dim b As Boolean = (s.Chars(i) = """"c)
                If (b) Then
                    i += 1
                    j = s.IndexOf(""""c, i)
                Else
                    j = s.IndexOf(","c, i)
                End If
                if (j < 0) then j = s.Length
                t = s.Substring(i, j - i)
                If (b AndAlso j < s.Length - 1 AndAlso s.Chars(j + 1) = """"c) Then
                    h.Append(t)
                    h.Append(""""c)
                    i = j + 1
                Else
                    h.Append(t)
                    a.Add(h.ToString)
                    h.Length = 0
                    i = j + 1
                    If (b) Then i += 1
                End If
            End While
            GetCSV = CType(a.ToArray(Type.GetType("System.String")), String())
        End Function
    End Class
End Namespace

public static void Main(string[] args)
{
	if (args.Length == 0)
	{
		MessageBox.Show("ドラッグ＆ドロップして下さい");
		return;
	}
	string s = args[0];
	string t = s.Replace(".","_.");
	if (t == s) t = s + "_";
	File.Move(s,t);
	try
	{
		FileStream fs = new FileStream(t,FileMode.Open);
		byte[] b = new Byte[fs.Length];
		fs.Read(b,0,b.Length);
		fs.Close();
		char[] c = new char[b.Length];
		b.CopyTo(c,0);
		fs = new FileStream(s,FileMode.Create);
		byte[] bb = System.Convert.FromBase64CharArray(c,0,c.Length);
		fs.Write(bb,0,bb.Length);
		fs.Close();
	}
	catch (FileNotFoundException fe)
	{
		MessageBox.Show("ファイルが見つかりません");
	}
}

public class NormalRandom
{
	private bool		bWhc;
	private Random		rnd;
	private double		mean_;
	private double		std_;
	private double[]	temp;
	public double Mean {get {return mean_;} set {mean_ = value;}}
	public double Std {get {return std_;} set {std_ = value;}}
	public NormalRandom() {Reset(); rnd = new Random();}
	public NormalRandom(int seed) {Reset(); rnd = new Random(seed);}
	private void Reset() {bWhc = false; mean_ = 0; std_ = 1; temp = new double[3];}
	public double NextDouble()
	{
		bWhc = !bWhc;
		if (bWhc) {
			do 
			{
				temp[0] = 2 * rnd.NextDouble() - 1;
				temp[1] = 2 * rnd.NextDouble() - 1;
				temp[2] = temp[0]*temp[0] + temp[1]*temp[1];
			} while(temp[2] > 1);
			if (temp[2] > 0)
				temp[2] = Math.Sqrt(-2 * Math.Log(temp[2]) / temp[2]);
		}
		return temp[bWhc ? 0 : 1] * temp[2] * std_ + mean_;
	}
}

using System;
using System.Collections;
using System.Reflection;

public class MyPath
{
	[AttributeUsage(AttributeTargets.Class|AttributeTargets.Property)]
	public class TargetAttribute : Attribute {}
	[AttributeUsage(AttributeTargets.Property)]
	public class IDAttribute : Attribute {}
	public static ArrayList SelectNodes(object o,string path)
	{
		string[] pth = path.Split('/');
		ArrayList res = new ArrayList();
		Parse(res,o,pth,1);
		return res;
	}
	public static void Parse(ArrayList a,object o,string[] pth,int idx)
	{
		if (idx >= pth.Length) return;
		IEnumerable e = o as IEnumerable;
		if (e != null)
		{
			foreach (object b in e) Parse(a,b,pth,idx);
			return;
		}
		Type t = o.GetType();
		object[] o1 = t.GetCustomAttributes(true);
		if (o1.Length == 0 || !(o1[0] is TargetAttribute)) return;
		PropertyInfo[] pis = t.GetProperties();
		if (pis == null) return;
		foreach (PropertyInfo pif in pis)
		{
			object[] o2 = pif.GetCustomAttributes(true);
			if (o2.Length == 0) continue;
			object p = o2[0];
			if (p is IDAttribute)
			{
				string s = pif.GetValue(o,null).ToString();
				if ((pth[idx] == s || pth[idx] == "*") && idx == pth.Length-1) a.Add(o);
			}
			else if (p is TargetAttribute)
			{
				Parse(a,pif.GetValue(o,null),pth,idx+1);
			}
		}
	}
}
[MyPath.Target]
public class Pref
{
	private	string name;
	private ArrayList list;
	[MyPath.ID]
	public string TagName {get {return name;}}
	[MyPath.Target]
	public ArrayList List {get {return list;}}
	public Pref(string s) {name = s; list = new ArrayList();}
	public void Add(City c) {list.Add(c);}
}
[MyPath.Target]
public class City
{
	private	string name;
	private ArrayList list;
	[MyPath.ID]
	public string TagName {get {return name;}}
	[MyPath.Target]
	public ArrayList List {get {return list;}}
	public City(string s) {name = s; list = new ArrayList();}
	public void Add(Town t) {list.Add(t);}
}
[MyPath.Target]
public class Town
{
	private	string name;
	[MyPath.ID]
	public string TagName {get {return name;}}
	public Town(string s) {name = s;}
}
public class Class1
{
	public static void Main(string[] args)
	{
		Town	t1 = new Town("町1"), t2 = new Town("町2");
		Town	t3 = new Town("町3"), t4 = new Town("町4");
		City	c1 = new City("千代田"), c2 = new City("新宿");
		Pref	p = new Pref("東京");
		p.Add(c1); p.Add(c2);
		c1.Add(t1); c1.Add(t2);
		c2.Add(t3); c2.Add(t4);
		ArrayList a;
			
		a = MyPath.SelectNodes(p,"/東京");
		foreach (object o in a) Console.WriteLine(o.GetType().GetProperty("TagName").GetValue(o,null));
		a = MyPath.SelectNodes(p,"/東京/*");
		foreach (object o in a) Console.WriteLine(o.GetType().GetProperty("TagName").GetValue(o,null));
		a = MyPath.SelectNodes(p,"/東京/*/*");
		foreach (object o in a) Console.WriteLine(o.GetType().GetProperty("TagName").GetValue(o,null));
	}
}

MethodInfo mi = typeof(Class1).GetMethod("func");
ThreadStart ts = (ThreadStart)Delegate.CreateDelegate(typeof(ThreadStart),mi);
Thread th = new Thread(ts);
th.Start();

Imports EnvDTE
Imports System.Diagnostics
Imports System.IO
Imports System.text.RegularExpressions
Imports Microsoft.VisualBasic
Imports Microsoft.VisualBasic.ControlChars

Public Class MyUtil
    Shared lineid As Integer     ' for AddLine
    Shared Function RepText(ByVal m As Match) As String
        lineid += 1
        Return String.Format("{0:D3}:", lineid)
    End Function

    Shared Sub AddLineNo()
        Dim doc As Document = ActiveDocument()
        Dim ts As TextSelection = doc.Selection
        ts.SelectAll()
        Dim s As String = ts.Text
        lineid = 0
        If (s.StartsWith("001")) Then
            s = Regex.Replace(s, "^.{4}", "", RegexOptions.Multiline)
        Else
            s = Regex.Replace(s, "^", AddressOf RepText, RegexOptions.Multiline)
        End If
        Dim fs As StreamWriter = New StreamWriter(doc.FullName)
        fs.Write(s)
        fs.Close()
    End Sub
End Class

public static void Main(string[] args)
{
	string s;
	if (args.Length != 1)
	{
		Assembly asm = Assembly.GetExecutingAssembly();
		Console.Error.WriteLine("usage: {0} plan_file",asm.GetName().Name);
		//Console.Error.Write("  show source? (y/n) ");
		//string res = Console.ReadLine();
		//if (!res.StartsWith("n"))
		{
			StreamReader srd = new StreamReader(
				asm.GetManifestResourceStream("CSTest.src.txt"),Encoding.GetEncoding("shift-jis"));
			s = srd.ReadToEnd();
			srd.Close();
			//Console.WriteLine(s);
			System.Windows.Forms.Clipboard.SetDataObject(s,true);
		}
		return;
	}
	...
}

using System;
using System.IO; 
using System.Reflection;
using System.Text;
using System.Windows.Forms;

public class Test 
{
	public static void Main(string[] args)
	{
		if (args.Length == 0)
		{
			MessageBox.Show("Drag&Drop Assembly");
			return;
		}
		Assembly asm = Assembly.LoadFile(args[0]);
		string[] mm = asm.GetManifestResourceNames();
		if (mm.Length == 0)
		{
			MessageBox.Show("Manifestはありません");
			return;
		}
		else if (MessageBox.Show("Manifest\r\n "+ string.Join("\r\n ",mm) + "を展開しますか？","",
			MessageBoxButtons.YesNo,MessageBoxIcon.Question) != DialogResult.Yes)
		{
			return;
		}
		Directory.SetCurrentDirectory(new FileInfo(asm.Location).DirectoryName);
		Encoding enc = Encoding.GetEncoding("shift-jis");
		foreach (string nam in mm)
		{
			StreamReader sr = new StreamReader(asm.GetManifestResourceStream(nam),enc);
			StreamWriter sw = new StreamWriter(nam);
			sw.Write(sr.ReadToEnd());
			sw.Close();
			sr.Close();
		}
	}
}

	/// <summary>
	/// N元1次連立方程式を解く
	/// </summary>
	public static double[] SolveMatrix(double[,] A, double[] b)
	{
		int			N = b.Length;
		if (N == 1)
		{
			return new double[]{b[0] / A[0,0]};
		}
		else if (N == 2)
		{
			double d = A[0,0]*A[1,1] - A[0,1]*A[1,0];
			return new double[]{(A[1,1]*b[0]-A[0,1]*b[1])/d, (-A[1,0]*b[0]+A[0,0]*b[1])/d};
		}
		else if (N == 3)
		{
			double d = A[0,0]*A[1,1]*A[2,2] + A[0,1]*A[1,2]*A[2,0] + A[0,2]*A[1,0]*A[2,1]
					 - A[0,2]*A[1,1]*A[2,0] - A[0,0]*A[1,2]*A[2,1] - A[0,1]*A[1,0]*A[2,2];
			return new double[]{
					(b[0]*A[1,1]*A[2,2] + A[0,1]*A[1,2]*b[2] + A[0,2]*b[1]*A[2,1]
				   - A[0,2]*A[1,1]*b[2] - b[0]*A[1,2]*A[2,1] - A[0,1]*b[1]*A[2,2])/d,
					(A[0,0]*b[1]*A[2,2] + b[0]*A[1,2]*A[2,0] + A[0,2]*A[1,0]*b[2]
				   - A[0,2]*b[1]*A[2,0] - A[0,0]*A[1,2]*b[2] - b[0]*A[1,0]*A[2,2])/d,
					(A[0,0]*A[1,1]*b[2] + A[0,1]*b[1]*A[2,0] + b[0]*A[1,0]*A[2,1]
				   - b[0]*A[1,1]*A[2,0] - A[0,0]*b[1]*A[2,1] - A[0,1]*A[1,0]*b[2])/d};
		}
		else
		{
			int			i,j,k;
			double[,]	a = (double[,])A.Clone();
			double[]	x = (double[])b.Clone();
			double		d;
			for (i=0;i<N;++i)
			{
				d = a[i,i];
				for (j=i;j<N;++j) a[i,j] /= d;
				x[i] /= d;
				for (j=i+1;j<N;++j)
				{
					d = a[j,i];
					for (k=i;k<N;++k) a[j,k] -= a[i,k]*d;
					x[j] -= d*x[i];
				}
			}
			for (i=N-1;i>0;--i)
			{
				for (j=0;j<i;++j) x[j] -= a[j,i]*x[i];
			}
			return x;
		}
	}

    using (System.Net.Sockets.TcpClient tcp = new System.Net.Sockets.TcpClient())
    {
        tcp.Connect(POPサーバー名,110);
        using (StreamWriter sw = new StreamWriter(tcp.GetStream()))
            sw.Write("USER ユーザ名\nPASS パスワード\nSTAT\nQUIT\n");
    }