INT []列表=新[] {3，99，6}; 
字符串s =的string.join（，，list.Select（X => x.ToString（））ToArray的（））; 
 

修改，C＃4.0

使用C＃4.0中，有 的另一个重载的string.join ，最终使传递一个的IEnumerable<串> 或的IEnumerable< T> 直接。没有必要创建一个数组，而且也没有必要要求的ToString（），这是隐式调用：

 字符串s =的string.join（，清单）; 
 

通过明确的格式化字符串：

 字符串s =的string.join（，list.Select（X => x.ToString（/*...*/））; 
 

I have an int array with the value 3,99,6. How do i convert the array into the string 3,99,6 with linq?

int[] list = new [] {3, 99, 6};
string s = string.Join(",", list.Select(x => x.ToString()).ToArray());

Edit, C# 4.0

With C# 4.0, there is another overload of string.Join, which finally allows passing an IEnumerable<string> or IEnumerable<T> directly. There is no need to create an Array, and there is also no need to call ToString(), which is called implicitly:

string s = string.Join(",", list);

With explicit formatting to string:

string s = string.Join(",", list.Select(x => x.ToString(/*...*/));