Getting"Insufficient memory to continue the execution of the program." exception,, when trying to write huge data in an excel sheet.

Hi,

In my project, There is a requirement of writing ~1000 columns and ~5000 rows of data from datatable to excel sheet, using C#.

When I convert all data from datatable to Object Array, and then try to load the Object array data to the excel sheet using below code :

  int rows = Output_DT.Rows.Count;
   int columns = Output_DT.Columns.Count;

   var startCell = (Excel.Range)oSheet.Cells[1, 1];
   var endCell = oSheet.Cells[rows + 1, columns];
   var writeRange = oSheet.Range[startCell, endCell];
   writeRange.Value2 = arr;

I am receiving an exception message as 

"Insufficient memory to continue the execution of the program.".

Kindly help me how to resolve this issue as I need to deliver my project , having above said requirements to my client .

Appreciate your help!!

Thanks in Advance.