C# Enumerable.Repeat

Enumerable.Repeat returns a collection with repeated elements. In the first argument, we specify a value—this is repeated the number of times specified in the second argument. This method is located in the System.Linq namespace.

Example

The Enumerable.Repeat method receives two arguments: the value you want to be repeated; and the number of times you want it to be repeated. This means that Enumerable.Repeat(1, 10) will yield ten ones in a sequence. The result is an IEnumerable of the type specified.

This C# example program uses the Repeat method on the Enumerable type. It requires System.Linq.

Program that uses Enumerable.Repeat [C#]

using System;
using System.Linq;

class Program
{
    static void Main()
    {
	// Create sequence of ten ones.
	var integers = Enumerable.Repeat(1, 10);
	// Display.
	foreach (int value in integers)
	    Console.WriteLine(value);
    }
}

Output

1
1
1
1
1
1
1
1
1
1

Converting to array. You can convert the IEnumerable result from Enumerable.Repeat to an array or List. Please use the ToArray or ToList methods and assign the result to a new array or List variable.

Summary

By providing a declarative way to create an array of repeated elements, the Enumerable.Repeat method can help simplify certain programs in the C# language. It can be used with many types, including ints as shown, strings, or other types.