C# : Could not load type System.Runtime.Diagnostics.ITraceSourceStringProvider

C# : Could not load type System.Runtime.Diagnostics.ITraceSourceStringProvider
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a secret feature that I want to reveal to you.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
Then, type the letters 'awesome' on your keyboard as the next step.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

Let me give you a quick introduction about myself,
Nice to meet you, I am Delphi.
I am capable of providing answers to your questions.
C# : Could not load type System.Runtime.Diagnostics.ITraceSourceStringProvider
If you need more specific information, let me know by leaving a comment or starting a chat.
If you have additional information or an answer to share, please comment below.
I will express my appreciation for your answer by 'hearting' it.
not Could type : C# System.Runtime.Diagnostics.ITraceSourceStringProvider load