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using Microsoft.Win32;
...
 
RegistryKey masterKey = Registry.LocalMachine.CreateSubKey
   ("SOFTWARE\\Test\\Preferences");
if (masterKey == null)
{
   Console.WriteLine ("Null Masterkey!");
}
else

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private static byte GetPositionHigherBit(int value)
{
    for (byte kk = 31; kk > 0; kk--)
        if ((value & (int)(Math.Pow(2, kk))) == (int)(Math.Pow(2, kk))) return kk;
    return 0;
}

private static int InvertBits(int value)
{
    var posbit = GetPositionHigherBit(value);

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using System;
using System.Xml;

public class GenerateXml {
    private static void Main() {
        XmlDocument doc = new XmlDocument();
        XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
        doc.AppendChild(docNode);

        XmlNode productsNode = doc.CreateElement("products");

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using System.Linq;
using Pdf_Rendering;
using System.IO;
using System.Reflection;
using System.Xml.Linq;
            
XNamespace namespacexml= "http://www.heidelberg.com";
if (Path.GetExtension(fn).ToLower() != ".xml") { Console.WriteLine("Input file not a pdf file"); return false; }
if (!File.Exists(fn)) { Console.WriteLine("Input file does not exist"); return false; }
XDocument doc = XDocument.Load(fn);

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/// <summary>
/// method to validate an IP address
/// using regular expressions. The pattern
/// being used will validate an ip address
/// with the range of 1.0.0.0 to 255.255.255.255
/// </summary>
/// <param name="addr">Address to validate</param>
/// <returns></returns>
public bool IsValidIP(string addr)
{

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String Format for Double

// just two decimal places
String.Format("{0:0.00}", 123.4567);      // "123.46"
String.Format("{0:0.00}", 123.4);         // "123.40"
String.Format("{0:0.00}", 123.0);         // "123.00"

// max. two decimal places
String.Format("{0:0.##}", 123.4567);      // "123.46"
String.Format("{0:0.##}", 123.4);         // "123.4"

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//Fill a combobox with an enumerator
    TypeofItems_cb.Items.Clear();
    foreach (var it in Enum.GetValues(typeof(Recipe.ProductType)))
    {
        TypeofItems_cb.Items.Add(it.ToString());
    }

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Type That Owns Disposable Fields Implements IDisposable: Good Practice 
public class OwnsDisposableFields : IDisposable 
{ 
    private DisposableResource disposableResourceOne; 
    private DisposableResource disposableResourceTwo; 
    // Other fields continue to be declared here. 
 
    private bool disposed; 
 
    ~OwnsDisposableFields() 

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/// <summary>
/// Function to get object from byte array
/// </summary>
/// <param name="_ByteArray">byte array to get object</param>
/// <returns>object</returns>
public object ByteArrayToObject(byte[] _ByteArray)
{
    try
    {
        // convert byte array to memory stream

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http://yaxlib.codeplex.com/


YAXLib: Yet Another XML Serialization Library for the .NET Framework