How to check for data in an array with specified length

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C#

Hi all,

Can anybody tell me how to check for data in an array with a fixed length & And I should check data only for few indices's and neglect the rest even if the array length is more than the index specified.

Like I have an array with fixed length of 72, since the index is user defined and is varied from 4-72 I have written conditions for all the 72 values of the array. So in the 1ast iteration I should check for some condition only till 12 indices length of that array and in the next iteration the index may be 36 so I need to check only 1st last 36 indices's of that array n neglect the rest. This index is user defined it may vary from 4-72. So how to handle this?

The code is shown below:

int[] errorIndexOne = new errorIndexOne[72];

if (errorIndexOne[0] == 1)
           {
               if (btn[0].BackColor == Color.LimeGreen)
               {
                   btn[0].BackColor = Color.Red;
               }
               else
               {
                   btn[0].BackColor = Color.LimeGreen;
               }
           }

           if (errorIndexOne[1] == 1)
           {
                if (btn[1].BackColor == Color.LimeGreen)
                {
                    btn[1].BackColor = Color.Red;
                }
                else
                {
                    btn[1].BackColor = Color.LimeGreen;
                }
           }

           if (errorIndexOne[2] == 1)
           {
               if (btn[2].BackColor == Color.LimeGreen)
               {
                   btn[2].BackColor = Color.Red;
               }
               else
               {
                   btn[2].BackColor = Color.LimeGreen;
               }
           }

           if (errorIndexOne[3] == 1)
           {
               if (btn[3].BackColor == Color.LimeGreen)
               {
                   btn[3].BackColor = Color.Red;
               }
               else
               {
                   btn[3].BackColor = Color.LimeGreen;
               }
           }

           if (errorIndexOne[4] == 1)
           {
               if (btn[4].BackColor == Color.LimeGreen)
               {
                   btn[4].BackColor = Color.Red;
               }
               else
               {
                   btn[4].BackColor = Color.LimeGreen;
               }
           }

           if (errorIndexOne[5] == 1)
           {
               if (btn[5].BackColor == Color.LimeGreen)
               {
                   btn[5].BackColor = Color.Red;
               }
               else
               {
                   btn[5].BackColor = Color.LimeGreen;
               }
           }

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         if (errorIndexOne[72] == 1)
           {
               if (btn[72].BackColor == Color.LimeGreen)
               {
                   btn[72].BackColor = Color.Red;
               }
               else
               {
                   btn[72].BackColor = Color.LimeGreen;
               }
           }