JohanLarsson

public static class ListExt
{
    public static IEnumerable<T[]> GetSubsets<T>(this List<T> set, int subsetLength)
    {
        int[] indices = Enumerable.Range(0, subsetLength).ToArray();
        while (true)
        {
            yield return indices.Select(i => set[i]).ToArray();
            indices = Increment(indices, set.Count - 1);
            if (indices == null)

JohanLarsson

public static class StopwatchExt
{
    public static string GetTimeString(this Stopwatch stopwatch, int numberofDigits = 1)
    {
        double s = stopwatch.ElapsedTicks / (double)Stopwatch.Frequency;
        if (s > 1)
            return Math.Round(s, numberofDigits) + " s";
        if (s > 1e-3)
            return Math.Round(1e3 * s, numberofDigits) + " ms";
        if (s > 1e-6)

JohanLarsson

public static class ListEx
{
    public static IEnumerable<T> WrappingEnumerator<T>(this List<T> list)
    {
        var i = 0;
        while (true)
        {
            yield return list[i];
            i = (i < (list.Count - 1))
                    ? i + 1

JohanLarsson

using System.Collections.Generic;
using NUnit.Framework;
class LinqExtTests
{
    [TestCase(0, 0, 0, 0)]
    [TestCase(1, 0, 0, 0)]
    [TestCase(0, 1, 0, 1)]
    [TestCase(0, 0, 1, 2)]
    public void MaxByTest(int first, int second, int third, int expectedIndex)
    {

JohanLarsson

public class PerformanceTests 
{
    [Test]
    public void ReadSpeedTest()
    {
        var excelApp = new Application();
        var workbook = excelApp.Workbooks.Add();
        var sheet = (Worksheet)workbook.Worksheets[1];
        var ns = new[] { 10, 100, 1000, 10000 };
        BatchWrite(sheet, ns.Max());

JohanLarsson

public class InternetConnection
{
    /// <summary>
    /// Check if internetconnection is available
    /// </summary>
    /// <param name="lpdwFlags">Returns info about connection</param>
    /// <param name="dwReserved">Reserved pass 0 (default)</param>
    /// <returns></returns>
    [DllImport("wininet.dll", CharSet = CharSet.Auto)]
    private extern static bool InternetGetConnectedState(ref InternetConnectionState_e lpdwFlags, int dwReserved = 0);

JohanLarsson

[TestCase(typeof(Stats), "StatsProp")]
public void CreateListView(Type type, string bindingPopertyName)
{
    PropertyInfo[] propertyInfos = type.GetProperties();
    var listView = new XElement("ListView");
    listView.Add(new XAttribute("ItemsSource", string.Format(@"{{Binding {0}}}", bindingPopertyName)));
    var view = new XElement("ListView.View");
    var gridView = new XElement("GridView");
    foreach (var propertyInfo in propertyInfos)
    {

JohanLarsson

public static class AttachedProperties
{
    public static readonly DependencyProperty IconProperty = DependencyProperty.RegisterAttached(
        "Icon",
        typeof (StreamGeometry),
        typeof (AttachedProperties),
        new PropertyMetadata(default(StreamGeometry))
        );

    public static void SetIcon(UIElement element, StreamGeometry value)

JohanLarsson

<UserControl x:Class="Namespace.FileControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d">
    <Grid Height="Auto">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition/>

JohanLarsson

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Net;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;