C# : implementing MSOexcel

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C#

So here's the situation, i'm currently trying to implement excel in my program so it can put the data generated by my program into a table format. At one point, i have to do a loop which will write the data in a column on excel, although i find myself not skilled enough to get the right syntax...

i started that way :

Excel.Worksheet xdata;
y = 2 * x; 

for(x = 0; x < 10; x++)
{
     // i want to fill the first column of data that is  
     // provided by the function y in excel...
     {

i know it's something xdata.cells. something etc etc... but i can't seem to find the right syntax :(

A help would be greatly appreciated
A BIG thanks in advance.