--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HowTo/Aspects/ClearCacheAspect.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,83 @@
+using System;
+
+using NUnit.Framework;
+
+using BLToolkit.Aspects;
+using BLToolkit.Reflection;
+
+namespace HowTo.Aspects
+{
+	[TestFixture]
+	public class ClearCacheAspect
+	{
+		public /*[a]*/abstract/*[/a]*/ class TestClass
+		{
+			public static int Value;
+
+			// This is a method we will cache. Cached return value depends on input parameters.
+			// We will change the 'Value' field outside of the class and see how it affects the result.
+			//
+			[/*[a]*/Cache/*[/a]*/(MaxCacheTime=500, IsWeak=false)]
+			public /*[a]*/virtual/*[/a]*/ int CachedMethod(int p1, int p2)
+			{
+				return Value;
+			}
+
+			// This method clears the CachedMethod cache.
+			//
+			[/*[a]*/ClearCache/*[/a]*/(/*[a]*/"CachedMethod"/*[/a]*/)]
+			public abstract void ClearCache();
+
+			// The CachedMethod is specified by name and parameters.
+			// Also you can use declaring method type.
+			//
+			[/*[a]*/ClearCache/*[/a]*/(/*[a]*/"CachedMethod"/*[/a]*/, /*[a]*/typeof(int), typeof(int)/*[/a]*/)]
+			public abstract void ClearCache2();
+
+			// This method clears all caches for provided type.
+			//
+			[/*[a]*/ClearCache/*[/a]*/(/*[a]*/typeof(TestClass)/*[/a]*/)]
+			public abstract void ClearAll();
+
+			// This method clears all caches for current type.
+			//
+			[/*[a]*/ClearCache/*[/a]*/]
+			public abstract void ClearAll2();
+
+			public static TestClass CreateInstance()
+			{
+				// Use TypeAccessor to create an instance of an abstract class.
+				//
+				return /*[a]*/TypeAccessor/*[/a]*/<TestClass>.CreateInstance();
+			}
+		}
+
+		[Test]
+		public void Test()
+		{
+			TestClass tc = TypeAccessor<TestClass>.CreateInstance();
+
+			TestClass.Value = 1;
+
+			int value1 = tc.CachedMethod(1, 2);
+
+			TestClass.Value = 2;
+
+			int value2 = tc.CachedMethod(1, 2);
+
+			// The cached values are equal.
+			//
+			Assert.AreEqual(value1, value2);
+
+			tc.ClearCache();
+
+			TestClass.Value = 3;
+
+			// Previous and returned values are not equal.
+			//
+			Assert.AreNotEqual(value1, tc.CachedMethod(1, 2));
+
+			tc.ClearCache2();
+		}
+	}
+}