How do I convert a list element to text?

Hello,

You're missing the .Text property for your input. Try the example below, and it should work. If you'd like to display all the items as a comma-separated string, you can use string.Join() to combine the strings.

List liststStringParsed = new List();
liststStringParsed.Add("a");
liststStringParsed.Add("b");
liststStringParsed.Add("c");
gTBxChar2.Text = liststStringParsed[2];

Or

// Combine list values with a comma and assign to the TextBox
gTBxChar2.Text = string.Join(", ", liststStringParsed);

string result = String.Join(",", liststStringParsed);

Here is a detailed article: How To Convert a List to a String in C#

https://www.c-sharpcorner.com/article/convert-list-of-strings-into-single-string/