--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Linq/Extensions.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+
+using JetBrains.Annotations;
+
+namespace BLToolkit.Linq
+{
+	public static class Extensions
+	{
+		public static IEnumerable<TResult> Zip<TFirst,TSecond,TResult>(
+			[NotNull] this IEnumerable<TFirst>     first,
+			[NotNull] IEnumerable<TSecond>         second,
+			[NotNull] Func<TFirst,TSecond,TResult> resultSelector)
+		{
+			if (first          == null) throw new ArgumentNullException("first");
+			if (second         == null) throw new ArgumentNullException("second");
+			if (resultSelector == null) throw new ArgumentNullException("resultSelector");
+
+			using (var e1 = first.GetEnumerator())
+			using (var e2 = second.GetEnumerator())
+				while (e1.MoveNext() && e2.MoveNext())
+					yield return resultSelector(e1.Current, e2.Current);
+		}
+	}
+}