Accepted answer

Your example is not an empty sequence, it's a sequence with one element. To create an empty sequence of strings you can do

var sequence = Enumerable.Empty<string>();

EDIT OP clarified they were looking to create a single value. In that case

var sequence = Enumerable.Repeat("abc",1);


or just create a method

public static IEnumerable<T> CreateEnumerable<T>(params T[] items)
    if(items == null)
        yield break;

    foreach (T mitem in items)
        yield return mitem;


public static IEnumerable<T> CreateEnumerable<T>(params T[] items)
   return items ?? Enumerable.Empty<T>();

usage :

IEnumerable<string> items = CreateEnumerable("single");


Or even shorter,

string[] single = { "abc" };

I would make an extension method:

public static T[] Yield<T>(this T item)
    T[] single = { item };
    return single;

Or even better and shorter, just

public static IEnumerable<T> Yield<T>(this T item)
    yield return item;

Perhaps this is exactly what Enumerable.Repeat is doing under the hood.


I like what you suggest, but with the array type omitted:

var sequence = new[] { "abc" };

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