c:\AprendendoCSharp>c:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe MeuPrimeiroPrograma.txt Microsoft (R) Visual C# Compiler version 4.8.3752.0 for C# 5 Copyright (C) Microsoft Corporation. All rights reserved.
This compiler is provided as part of the Microsoft (R) .NET Framework, but only supports language versions up to C# 5, which is no longer the latest version. For compilers that support newer versions of the C# programming language, see http://go.microsoft.com/fwlink/?LinkID=533240
MeuPrimeiroPrograma.txt(1,1): error CS0116: Um namespace não pode conter diretamente membros, como campos ou métodos
