Question

In C#, How do I call a function that is returning a list?

    static void Main(string[] args)  
    {  
        List<string> range = new List<string>();  
        range.ForEach(item => item.WildcardFiles());  //this is not working             
    }  

    List<string> WildcardFiles(string first)  
    {  
        List<string> listRange = new List<string>();  
        listRange.Add("q");  
        listRange.Add("s");  

        return listRange;  
    }  

Answer 1

There are various things wrong with your code:

• You’re creating an empty list, and then calling ForEach on it. That’s not going to do anything.
• You’re trying to call WildcardFiles on a string, when it’s not a method of string.
• You’re trying to call WildcardFiles which is an instance method in whatever your declaring type is, but without any instances of that type.
• You’re trying to call WildcardFiles without passing in an argument for the first parameter
• You’re ignoring the return value of the call to WildcardFiles
• WildcardFiles ignores its parameter

Now I suspect you really wanted something like:

static void Main(string[] args)  
{  
    List<string> range = WildcardFiles();
    foreach (string item in range)
    {
        // Do something with item
    }
}  

static List<string> WildcardFiles()
{  
    List<string> listRange = new List<string>();  
    listRange.Add("q");  
    listRange.Add("s");  

    return listRange;  
}