--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HowTo/Aspects/CounterAspect.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,62 @@
+using System;
+using System.Reflection;
+
+using NUnit.Framework;
+
+using BLToolkit.Aspects;
+using BLToolkit.Reflection;
+
+namespace HowTo.Aspects
+{
+	[TestFixture]
+	public class CounterAspectTest
+	{
+		public /*[a]*/abstract/*[/a]*/ class TestClass
+		{
+			// This is a method we collect statistic for.
+			// Actually the entire class or even a base class 
+			// can be decorated with the attribute.
+			//
+			[/*[a]*/Counter/*[/a]*/]
+			public /*[a]*/virtual/*[/a]*/ void TestMethod()
+			{
+			}
+		}
+
+		[Test]
+		public void Test()
+		{
+			TestClass t = TypeAccessor<TestClass>.CreateInstance();
+
+			for (int i = 0; i < 10; i++)
+				t.TestMethod();
+
+			MethodInfo     methodInfo = typeof(TestClass).GetMethod("TestMethod");
+			MethodCallCounter counter = CounterAspect.GetCounter(methodInfo);
+
+			Assert.AreEqual(10, counter.TotalCount);
+
+			Console.WriteLine(@"
+Method         : {0}.{1}
+TotalCount     : {2}
+ExceptionCount : {3}
+CachedCount    : {4}
+CurrentCalls   : {5}
+TotalTime      : {6}
+MinTime        : {7}
+MaxTime        : {8}
+AverageTime    : {9}
+",
+				counter.MethodInfo.DeclaringType.Name,
+				counter.MethodInfo.Name,
+				counter.TotalCount,              // total actual calls (no cached calls)
+				counter.ExceptionCount,          // calls with exceptions
+				counter.CachedCount,             // cached calls
+				counter.CurrentCalls.Count,      // current calls (make sense for multithreading)
+				counter.TotalTime,               // total work time
+				counter.MinTime,                 // min call time
+				counter.MaxTime,                 // max call time
+				counter.AverageTime);            // average call time
+		}
+	}
+}