If "The ReadKey method reads from the keyboard even if the standard input is redirected to a file with the SetIn method," what causes it to raise an InvalidOperationException.

### Type of issue

Other (describe below)

### Description

Under the Exceptions heading, the cited article states that an `InvalidOperationException` Exception arises when the standard input stream is directed away from the console. However, the Remarks section states, "The `ReadKey` method reads from the keyboard even if the standard input is redirected to a file with the `SetIn` method."

If that is so, the only situation that can give rise to the `nvalidOperationException` Exception can arise is when the standard input is redirected by a `<` character in the script, or in the directions given to the `CreateProceess` Win32 API call that started it.

If my surmise is correct, I suggest that the note under the Exception heading could stand some clarification.

### Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.console.readkey?view=netframework-4.8&devlangs=csharp&f1url=%3FappId%3DDev17IDEF1%26l%3DEN-US%26k%3Dk(System.Console.ReadKey)%3Bk(TargetFrameworkMoniker-.NETFramework%2CVersion%253Dv4.8)%3Bk(DevLang-csharp)%26rd%3Dtrue

### Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System/Console.xml

### Document Version Independent Id

34e1ae24-09a1-ba9e-77c3-f2a74ae05769

### Article author

@dotnet-bot