excel中怎么将单元格合并并赋值

excel中如何将单元格合并并赋值
如题

[解决办法]
Excel.Application myExcel=new Excel.Application();
myExcel.Application.Workbooks.Add(true);
myExcel.Visible=true;
Excel.Worksheet worksheet=(Excel.Worksheet)myExcel.ActiveSheet;

Excel.Range rH = worksheet.get_Range( "A1 ", "A3 ");
rH.Merge(0);
myExcel.Cells[1,1]= "赋值 ";