Range and Repeat C# with Example

The Range and Repeat static methods on Enumerable can be used to generate simple sequences. 
Range 
Enumerable.Range() generates a sequence of integers given a starting value and a count. 
// Generate a collection containing the numbers 1-100 ([1, 2, 3, ..., 98, 99, 100]) 
var range = Enumerable.Range(1,100); 
Live Demo on .NET Fiddle 
Repeat 
 

Enumerable.Repeat() generates a sequence of repeating elements given an element and the number of repetitions 
required. 
// Generate a collection containing "a", three times (["a","a","a"]) 
var repeatedValues = Enumerable.Repeat("a", 3); 
Live Demo on .NET Fiddle