VAR的结果=的string.join（，，ARR）;
 

这使用以下过载的string.join ：

 公共静态字符串加入＆LT; T＆GT;（字符串分隔符，IEnumerable的＆LT; T＆GT;值）;
 

It's a simple question, I am newbie in C#, how can I do this :

convert an array of integers to a comma-separated string

I have

int[] arr = new int[5] {1,2,3,4,5};

I want to convert it to one string

string => "1,2,3,4,5"

var result = string.Join(",", arr);

This uses the following overload of string.Join:

public static string Join<T>(string separator, IEnumerable<T> values);