Is there a built-in function to repeat a string or char in .NET?

string.Concat(Enumerable.Repeat("ab", 2));

returns

"abab"

string.Join("", Enumerable.Repeat("ab", 2));

Returns

"abab"

And

string.Join("", Enumerable.Repeat('a', 2))

Returns

"aa"

For strings you should indeed use Kirk's solution:

string.Join("", Enumerable.Repeat("ab", 2));

However for chars you might as well use the built-in (more efficient) string constructor:

new string('a', 2); // returns aa

new String('*', 5)

See Rosetta Code.

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