C# save textbox as excel error

Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.ApplicationClass();

The error is as follows:

Error CS1752 Cannot embed interop type 'ApplicationClass'. Please use the applicable interface instead.

Modify the following error to solve:

Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();