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public static class GrainExtensions
{
    /// <summary>
    /// Get string Id
    /// </summary>
    /// <param name="grain"></param>
    /// <returns></returns>
    public static string GetId(this IGrainWithStringKey grain) => grain.GetPrimaryKeyString();

    /// <summary>

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[StructLayout(LayoutKind.Sequential)]
public struct FixedArray8<T>
    where T : unmanaged
{
    public T Value0;

    public T Value1;

    public T Value2;

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/**
 *
 *
 * @param {SVGSVGElement} svg: root svg element
 * @param {number} x
 * @param {number} y
 * @param {SVGMatrix} ctm: element.getScreemCTM()
 * @returns {SVGPoint} real position in container
 */

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<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFrameworks>net472;netcoreapp3.0</TargetFrameworks>
    <UseWPF>true</UseWPF>
  </PropertyGroup>
  <ItemGroup Condition=" '$(TargetFramework)' == 'net472' ">
    <Reference Include="System" />
    <Reference Include="System.Data" />

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<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFrameworks>net472;netcoreapp3.0</TargetFrameworks>
    <UseWindowsForms>true</UseWindowsForms>
    <LangVersion>7.3</LangVersion>
  </PropertyGroup>
  <ItemGroup Condition=" '$(TargetFramework)' == 'net472' ">
    <Reference Include="System" />

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void Update(Entity entity)
{
    if (entity == null)
    {
        throw new ArgumentNullException(nameof(entity));
    }

    db.Entry(entity).State = EntityState.Detached;
    var old = db.Entities.Find(entity.Id);
    var oldEntry = db.Entry(old);

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public class CameraDragMove : MonoBehaviour
{
    private Vector3 ResetCamera;

    private Vector3 Origin;

    private Vector3 Diference;

    private bool Drag = false;

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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<#
.NOTES
How to use: Open Visual Studio, go to Tools – External Tools to bring up the External Tools dialog, add a new tools menu with the following configuration:
Title: Manage User Secrets (Or whatever you want)
Command: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe (Path to powershell.exe)
Arguments: Path-to-this-script(e.g. D:\VisualStudioTools\usersecrets.ps1)
Initial Directory: $(ProjectDir)

.PARAMETER ProjectFilePath
The csproj file's path, or keep it empty to search *.csproj file in initial directory

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param (
    [Parameter(Mandatory = $true)]
    [string] $FabricDataRoot,

    [Parameter(Mandatory = $true)]
    [string] $FabricLogRoot
)
$Preferences = Get-MpPreference
$ExclusionList = "$env:ProgramFiles\Microsoft Service Fabric",
                  $FabricDataRoot,