C# linq 将数组转换为以逗号或其它符号分隔的字符串

string[] array = { "A", "B", "C", "D" };
string str = string.Join(",", array);

var insuredLogs = Model.Select(i => i.InsuredLogId).ToArray();
<input type="text" id="InsuredLogs" name="InsuredLogs" value="@string.Join(",",insuredLogs)"/>