This short post will kick off a series covering some of the new features in C#.
One small but much requested feature is the ability to use any kind of collection for params. Previously you had to pass in an array:
public void MyMethod(int firstParam, params string[] otherParams)
{
foreach (var param in otherParams)
{
Console.WriteLine(param);
}
}
But now you can pass in any kind of collection,
public void MyMethod(int firstParam, params List<string> otherParams)
{
foreach (var param in otherParams)
{
Console.WriteLine(param);
}
}
This can save a great deal of fussing, converting your collection to an array and back.
Please note that this is a preview feature. Fortunately, Intellisense will convert your project for you. When you put this in you’ll get the dreaded red squiggly. Click on the light bulb and let it convert your project. Hey! Presto! it works.
We’ll look at a few bigger features in coming blog posts.
I’m not sure why but this weblog is loading incredibly slow for me. Is anyone else having this issue or is it a issue on my end? I’ll check back later and see if the problem still exists.
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This is a fantastic simplification for anyone dealing with variadic methods; cutting out the manual array conversion between collections will save a lot of boilerplate. I’m particularly excited to see how this affects the pattern matching in more complex scenarios, so I look forward to the deeper dives in the upcoming parts of the series.
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