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public partial class MyUserControl : UserControl
{
    // The dependency property definition.
    public static readonly DependencyProperty MyStateProperty =
        DependencyProperty.Register
        (
            "MyState", // Name of dependency property.
            typeof(string), // Type of dependency property.
            typeof(MyUserControl), // Type of the class who owns the dependency property.
            new FrameworkPropertyMetadata

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// Modified based on http://stackoverflow.com/questions/1322037/

public static class StringUtils
{
    private static Regex FormatPattern =
        new Regex(@"(\{+)([^\}]+)(\}+)", RegexOptions.Compiled);

    public static string Format(this string pattern, object template)
    {
        if (template == null)

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gsettings set org.gnome.desktop.wm.preferences mouse-button-modifier "<Super>"

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<UserControl
    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"
    xmlns:my="clr-namespace:MyProject"
    x:Class="MyProject.MyUserControl"
    mc:Ignorable="d" d:DesignHeight="100" d:DesignWidth="640"
    >

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# If you want to reinstall the packages for a project
Update-Package -Reinstall -ProjectName Your.Project.Name

# If you want to reinstall the packages for a solution
Update-Package -Reinstall

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# 这个还能保留上一次的更改。
git reset --soft HEAD^

# 这个不能保留上一次的更改。
git reset --hard HEAD^

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Mount-DiskImage -ImagePath X:\cn_windows_server_2012_r2_with_update_x64_dvd_4048415.iso

# Note that ImagePath must be absolute path.

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Set-VirtualDisk -FriendlyName "September Disk" -IsManualAttach 0

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

using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Table;

/// <summary>
/// The table entities that extend from this type will have rich support in property types.
/// </summary>

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// Copied from:
// http://www.minddriven.de/index.php/technology/dot-net/c-sharp/efficient-expression-values

public static class Guard
{
    public static void AssertNotNull<T>(Expression<Func<T>> selector)
    {
        var memberSelector = (MemberExpression)selector.Body;
        var constantSelector = (ConstantExpression)memberSelector.Expression;
        var value = ((FieldInfo)memberSelector.Member).GetValue(constantSelector.Value);