字符串插值 - 重复

Question

Is there any way to interpolate variable several times without repeating?

For example:

var name = "bla";
Console.WriteLine($"foo {name:repeat:2} bar")

to print

foo blabla bar

I'm particularly interested in interpolating several line breaks instead of repeating {Environment.NewLine} several times in the interpolation mask like this:

$"{Environment.NewLine}{Environment.NewLine}"

Answer 1

public static string Repeat(this string s, int times, string separator = "")
{
    return string.Join(separator, Enumerable.Repeat(s, times));
}

Then use:

Console.WriteLine($"foo {name.Repeat(2)} bar")

Answer 2

You could write an extension method for the string type, thats repeating its input. Then simply use this method within the curly braces.

Answer 3

You could also use

var name = "bla";
Console.WriteLine("foo {0}{0} bar", name);
// or
var s = String.Format("foo {0}{0} bar", name);

It will help you not repeating the same string, just index of it.

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