Changing font size of one cell in excel using C#

Question

I am working on a project that writes data to an Excel file.

Everything is finished now, however I need a few cells with a bigger size than the rest (title, etc). <

Answer 1

When working with interop excel, try not to write your code with "two dots" in order to clean interop excel objects. This also helps having your code more readable. Anyway, to answer your question, and using what I have pointed out... all you have to do is:

//Declare your variables
Application excel = null;
Workbook excelworkBook = null;
Range excelCellrange = null;
Worksheet worksheet = null;
Font excelFont =null;

//start your application
excel = new Application();
try
{
   ...
   //your code goes here...
   excelCellrange = worksheet.Range[worksheet.Cells[1,7],worksheet.Cells[1,7]];
   excelFont = excelCellrange.Font;
   excelfont.Size = 20;
   ...
   ...
}
catch(Exception ex){
}
finally{
   //here put something to clean the interop objects as the link above.
   ...
   Marshal.ReleaseComObject(excelfont);
   ...
}