How do I get the current username in .NET using C#?

Option A)

string userName = System.Security.Principal.WindowsIdentity.GetCurrent().Name;

• Returns: NetworkName\Username
• Gets the user’s Windows logon name.
• Details: https://docs.microsoft.com/en-us/dotnet/api/system.security.principal.windowsidentity

Option B)

string userName = Environment.UserName

• Returns: Username
• Gets the user name of the person who is associated with the current thread.
• Details: https://docs.microsoft.com/en-us/dotnet/api/system.environment.username