/// <summary>
/// Gets a table
/// </summary>
public virtual IQueryable<T> Table
{
get
{
return this.Entities;
}
}
/// <summary>
/// Gets a table with "no tracking" enabled (EF feature) Use it only when you load record(s) only for read-only operations
/// </summary>
public virtual IQueryable<T> TableNoTracking
{
get
{
return this.Entities.AsNoTracking();
}
}In Java, all non-static methods are by default "virtual functions." Only methods marked with the keyword final, which cannot be overridden, along with private methods, which are not inherited, are non-virtual.
void Main()
{
new B("name");
}
class A
{
public A()
{
Method();
}
protected virtual void Method()
{
}
}
class B : A
{
private string Property { get; set; }
public B(string value)
{
Property = value;
}
protected override void Method()
{
Console.WriteLine(Property.Length);
}
}addAgent.AddAgentMain(TextBoxSurName.Text);
ButtonAddAgent.Click += new System.EventHandler(AddAgent1);private void newAgent()
{
Button ButtonAddAgent = new Button();
ButtonAddAgent.Text = "Добавить агента";
ButtonAddAgent.AutoSize = true;
ButtonAddAgent.Location = new System.Drawing.Point(290, 200);
ButtonAddAgent.Click += new System.EventHandler(AddAgent1);
addAgent.OnAddAgent += AddAgent2;
splitContainer1.Panel2.Controls.Add(ButtonAddAgent);
}
private void AddAgent1 (object sender, EventArgs e)
{
MessageBox.Show("Before firing OnAddAgent event");
addAgent.AddAgentMain(TextBoxSurName.Text);
}
private void AddAgent2(object sender, AddAgentEventArgs e)
{
Console.WriteLine("Inside OnAddAgent event handler");
MessageBox.Show(e.AddAgentInfo);
}public void AddAgentMain(string test)
{
var handler = OnAddAgent;
if (handler != null)
{
// Создаём объект аргумента события и помещаем в него текст письма
var e = new AddAgentEventArgs { AddAgentInfo = test };
handler(this, e);
}
}public void AddAgentMain(string test)
{
// Создаём объект аргумента события и помещаем в него текст письма
var e = new AddAgentEventArgs { AddAgentInfo = test };
OnAddAgent?.Invoke(this, e);
}<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApplication1"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Button Click="Button_Click">
<ToggleButton Click="ToggleButton_Click" />
</Button>
</Window>private void Button_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("Button clicked");
}
private void ToggleButton_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("ToggleButton clicked");
e.Handled = true;
}class Employee
{
public int Id { get; set; }
public string Name { get; set; }
public int CompanyId { get; set; }
public override string ToString()
{
return string.Format("Employee Id = {0}, Name = {1}, CompanyId = {2}", Id, Name, CompanyId);
}
}
void Main()
{
var employees = new Employee[] {
new Employee() {Id = 1, Name = "Tim", CompanyId = 1111111},
new Employee() {Id = 2, Name = "Jack", CompanyId = 126555},
new Employee() {Id = 3, Name = "Tim", CompanyId = 1111111},
new Employee() {Id = 4, Name = "Kris", CompanyId = 59911919},
new Employee() {Id = 5, Name = "Tim", CompanyId = 1111111},
new Employee() {Id = 6, Name = "John", CompanyId = 1111111},
new Employee() {Id = 7, Name = "Kim", CompanyId = 1111111},
new Employee() {Id = 8, Name = "Clark", CompanyId = 9984848},
};
var filtered = from emp in employees group emp by emp.CompanyId into g where g.Count() == 1 select g.FirstOrDefault();
foreach (var emp in filtered)
{
Console.WriteLine(emp);
}
}#include <exception>
extern "C" {
__declspec(dllexport) void CrashTest()
{
std::exception* ex = 0;
ex->what();
}
}class Program
{
[DllImport("PInvokeCrashTest.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void CrashTest();
static void Main(string[] args)
{
AppDomain.CurrentDomain.UnhandledException += (s, e) =>
{
Console.WriteLine(string.Format("EXCEPTION: {0}", e.ExceptionObject.ToString()));
Process.GetCurrentProcess().Kill();
};
CrashTest();
}
}Unhandled Exception: System.AccessViolationException: Attempted to read or write
protected memory. This is often an indication that other memory is corrupt.
at ExceptionTest.Program.CrashTest()
at ExceptionTest.Program.Main(String[] args) in d:\PInvokeCrashTest\Exception
Test\Program.cs:line 25
<runtime>
<legacyCorruptedStateExceptionsPolicy enabled="true" />
</runtime>EXCEPTION: System.AccessViolationException: Attempted to read or write protected
memory. This is often an indication that other memory is corrupt.
at ExceptionTest.Program.CrashTest()
at ExceptionTest.Program.Main(String[] args) in d:\PInvokeCrashTest\Exception
Test\Program.cs:line 24