left rotation of array showing timeout error -

a left rotation operation on array of size shifts each of array's elements 1 unit left. example, if left rotations performed on array [1,2,3,4,5], array become [3 ,4 ,5 ,1 ,2] .

my code ran 7 test cases 2 test cases,it showing timeout error,how improve this

using system; using system.collections.generic; using system.io; class solution {     static void main(string[] args) {         /* enter code here. read input stdin. print output stdout. class should named solution */          string[] tokens = console.readline().split();             int = int.parse(tokens[0]);             int b = int.parse(tokens[1]);             string[] number = console.readline().split();             int [] array = new int[100000];             for(int i=0;i< a;i++)             {                 array[i]= int.parse(number[i]);               }              for(int i=1;i<= b;i++)             {                 int d = array[a - 1];                 array[a - 1] = array[0];                 for(int j=1;j<=a-2;j++)                 {                     array[j - 1] = array[j];                 }                  array[a - 2] = d;              }              for(int k=0;k< a;k++)             {                  console.write(array[k]+" ");             }              console.readkey();     } }