Include free courses from Desenvolvedor.io (#4086)

* Include courses

Include free courses from Desenvolvedor.io

* Update free-courses-pt_BR.md

* Correct

free-courses-pt_BR.md

@@ -43,13 +43,15 @@
 
 
 ### C Sharp
-
+* [Introdução ao Entity Framework Core](https://desenvolvedor.io/curso-online-introducao-entity-framework-core) - Rafael Almeida (Desenvolvedor.io)
+* [Iniciando com ASP.NET Core](https://desenvolvedor.io/curso-online-iniciando-com-asp-net-core) - Eduardo Pires (Desenvolvedor.io)
 * [C# e Windows Forms: Consultar CEP no WebService dos Correios](https://www.udemy.com/webservice-correios/) - Gilseone Moraes, Training4All Cursos (Udemy)
 * [C# e Windows Forms: Encurtando URLs com a API do Bitly](https://www.udemy.com/bitly-api/) - Gilseone Moraes, Training4All Cursos (Udemy)
 * [C# e Windows Forms: Utilizando Formulários MDI Parent](https://www.udemy.com/formularios-mdi/) - Gilseone Moraes, Training4All Cursos (Udemy)
 * [Manipulando Listas Genéricas em C#](https://www.udemy.com/listas-genericas-em-csharp/) - Gilseone Moraes, Training4All Cursos (Udemy)
 
 
+
 ### CSS
 
 * [Introdução à linguagem CSS](https://www.udemy.com/introducao-a-linguagem-css/) - Diego Mariano (Udemy)