var buttons = new Button[10];for(var i = 0; i < buttons.Length; i++)
{var button = new Button();button.Text = (i + 1) + ". Button - Click for Index!";button.OnClick += (s, e) => { Messagebox.Show(i.ToString()); };buttons[i] = button;
}
//如果我们点击按钮会发生什么

var button = new Button();
var index = i;
button.Text = (i + 1) + ". Button - Click for Index!";
button.OnClick += (s, e) => { Messagebox.Show(index.ToString()); };
buttons[i] = button;

Expression<Func<MyModel, int>> expr = model => model.MyProperty;
var member = expr.Body as MemberExpression;
var propertyName = memberExpression.Member.Name; //当 member != null的时候执行  ...

string WhatsMyName([CallerMemberName] string callingName = null)
{return callingName;
}

using System;
using System.Collections.Generic;
using System.Diagnostics;namespace LambdaTests
{class StandardBenchmark : Benchmark{const int LENGTH = 100000;static double[] A;static double[] B;static void Init(){var r = new Random();A = new double[LENGTH];B = new double[LENGTH];for (var i = 0; i < LENGTH; i++){A[i] = r.NextDouble();B[i] = r.NextDouble();}}static long LambdaBenchmark(){Func<double> Perform = () =>{var sum = 0.0;for (var i = 0; i < LENGTH; i++)sum += A[i] * B[i];return sum;};var iterations = new double[100];var timing = new Stopwatch();timing.Start();for (var j = 0; j < iterations.Length; j++)iterations[j] = Perform();timing.Stop();Console.WriteLine("Time for Lambda-Benchmark: \t {0}ms", timing.ElapsedMilliseconds);return timing.ElapsedMilliseconds;}static long NormalBenchmark(){var iterations = new double[100];var timing = new Stopwatch();timing.Start();for (var j = 0; j < iterations.Length; j++)iterations[j] = NormalPerform();timing.Stop();Console.WriteLine("Time for Normal-Benchmark: \t {0}ms", timing.ElapsedMilliseconds);return timing.ElapsedMilliseconds;}static double NormalPerform(){var sum = 0.0;for (var i = 0; i < LENGTH; i++)sum += A[i] * B[i];return sum;}}
}