Join two strings:
string s1 = "csharp"; string s2 = "tutorial"; string s = s1 + s2; //csharptutorial
using System; string[] arr = {"this", "is", "good"}; string s = String.Join(" ",arr); //this is good
using System.Collections.Generic; Listlst = new List (200,300,400); List lst2 = new List {4,9,18,3}; lst.AddRange(lst2); lst.Concat(lst2);
int[] arr1 = new int[] {200,300};; int[] arr2 = new int[] {3,4,2,1,5,8}; int[] arr = arr1.Concat(arr2);
using System.Data; dt.Merge(dt2);