ITDevSpace - Development Tips & Tricks

public class LimitedConcurrentQueue<T> : ConcurrentQueue<T> { public int Size { get ; private set ; } public LimitedConcurrentQueue( int size) { Size = size; } public new void Enqueue(T obj) { base .Enqueue(obj); lock ( this ) { while ( base .Count > Size) { T outObj; base .TryDequeue( out outObj); } } } } [Test] public void TestLimitedConcurrentQueue() { var queue = new LimitedConcurrentQueue< int >(3); queue.Enqueue(1); queue.Enqueue(2); queue.Enqueue(3); Console.WriteLine( string .Join(" , ", queue.ToArray())); //gives 1,2,3 queue.Enqueue(4); Console.WriteLine( string .Join(" , ", queue.ToArray())); //gives 2,3,4 }

Left outer join extension method is based on How to: Perform Left Outer Joins article. [Test] public void Test() { var list1 = new List< int >() { 1, 2, 3, 4, 5}.Select(x=> new {a=x, b=x*x}); var list2 = new List< int >() { 1, 2, 3, 4 }.Select(x => new { a = x, b = x * x * x }); var innerJoin = list1.Join(list2, x => x.a, y => y.a, (x, y) => new {a = x.a, b = x.b, c = y.b}); innerJoin.ForEach(Console.WriteLine); var leftOuterJoin = list1.LeftOuterJoin(list2, x => x.a, y => y.a, (x, y) => new { a = x.a, b = x.b, c = (y != null ) ? y.b : ( int ?) null }); leftOuterJoin.ForEach(Console.WriteLine); } public static class Extensions { public static IEnumerable<TResult> LeftOuterJoin<TOuter, TInner, TKey, TResult>( this IEnumerable<TOuter> outer, IEnumerable<TInner> inner, Func<TOuter, TKey> outerKeySelector, Func<TInner, TKey> innerKeySelector, Func<TOute