You need to write a logger.

Offering extra earnings. You need to write a logger with a single-window WPF interface and several tabs inside (two tabs will display the log itself, for example, using DataGrid). The information in the log is written simultaneously from different streams. It is necessary that the information is displayed in the log as quickly as possible.
At the moment, there is already a WPF application that performs this function, but it works crookedly, slowly and with glitches, t. q. I wrote it using the WPF FirstFloor library, which is a curve in itself, and I'm not familiar with WPF.
So it’s better to write everything from scratch.

Screenshot of my app window, styles can be taken from it