.NET 3.5 Sequence Methods Moved to Enumerable
I still see a lot of C# code samples around online that use Sequence.Range to generate a numerical range and Sequence.Repeat to repeat a number. This is a little confusing, because these methods may have been around in the early days of .NET 3.0, but have since moved to System.Linq.Enumerable.
Shown below is today’s correct usage for Range and Repeat.
using System.Linq;
// Generate a range of integers
// This will enumerate 3, 4, 5, 6, 7, 8, 9
IEnumerable<int> nums = Enumerable.Range(3, 7);
// Repeat any value a given number of times
// This will enumerate 5, 5, 5
IEnumerable<int> fives = Enumerable.Repeat(5, 3);
// This will enumerate "string", "string"
IEnumerable<string> strings = Enumerable.Repeat("string", 2);