C#のメソッド拡張でin

URL: http://stackoverflow.com/questions/501194/is-string-in-array

メソッド拡張

public static bool IsIn<T>(this T source, params T[] values)
{
    return values.Contains(source);
}

こう使える

string myStr = "str3"; 
bool found = myStr.IsIn("str1", "str2", "str3", "str4");
string myStr = "str3"; 
bool found = myStr.IsIn("str1", "str2", "str3", "str4");