.NET Framework Zip

Download .NET Framework for free

Example

.NET4.0
var tens = new[] {10,20,30,40,50};
var units = new[] {1,2,3,4,5};

var sums = tens.Zip(units, (first, second) => first + second);

Console.WriteLine(string.Join(",", sums));

//11,22,33,44,55
Managed Extensibility Framework