Find Textboxes != "" Transfer them to a label with a "," between each

Question

I am looking for a solution I have several TexBoxes I would like to get the information when there is some and insert them in a label with a "," between each. I had thought of a solution with Foreeach :

            List<TextBox> test = new List<TextBox>() { Test1, Test2, Test3, Test4, Test5, Test6 };
           
            if (test != null)
            {
            test .ForEach(("," + Result.Content.ToString());
            }

But he not work. any body for help me please ?

Answer 1

Use Join to join the strings and some linq

var ls = new List<TextBox>() 
{ 
    new TextBox() { Text = "test1" }, 
    new TextBox() { Text = "test2" }, 
    new TextBox() { Text = "test3" } 
};
var concat = string.Join(",", ls.Select(x=>x.Text));
Console.WriteLine(concat);