Try This
SqlConnection myConnection = new SqlConnection("Data Source=Igor;Initial Catalog=Prueba;Integrated Security=True");
Edit2:
For the Above Picture and for TEST_DB
database the Connection String should be written as
SqlConnection myConnection = new SqlConnection("Data Source=AJMOT-PC;User ID=sa;Password=thisismypassword;Initial Catalog=TEST_DB;Integrated Security=True");
If you are using the Window authentication for sql server then you don’t need to declare the User ID=sa;Password=thisismypassword
section.
1
solved SQL Server with C#