How can I check to see if a C# string array contains a value

Question

I have the following:

var a = new string[] {"a", "b", "c"};

How can I check this array to see if it contains "c"?

Answer 1

试试这个

bool x = a.Contains("c");

Answer 2

使用Contains扩展方法a.Contains("c");

Answer 3

If you don't want to use the extension method of System.Linq.Enumerable , or if you fear that's performing too bad, the "old" way is the ugly

Array.IndexOf(a, "c") != -1

Another ugly possibility is to use one of the explicit interface implementations, like

((IList<string>)a).Contains("c")

In some ways, arrays have an obsolete feeling to them.