C# List<string> and ArrayList are separated into strings with the specified delimiter

 

Original address: https://www.cnblogs.com/ahwwmb/p/4166707.html

Concatenates all elements of a string array with the specified delimiter between each element

 

            List<string> arr = new List<string>();
            arr.Add("Fun 1");
            arr.Add("Fun 1");
            arr.Add("Fun 1");
            string str = string.Join(",", arr.ToArray());

            ArrayList arr1 = new ArrayList();
            arr1.Add("Fun 1");
            arr1.Add("Fun 2");
            arr1.Add("Fun 3");
            string str1 = string.Join(",", arr1.ToArray(typeof(string)) as string[]);