Merge pull request #21499 from WilliamAntonRohm/issue-7373

sql-docs/issues/7373 -- update C# parentheses to square brackets

Author: PRMerger6

docs/relational-databases/server-management-objects-smo/create-program/using-collections.md

@@ -50,9 +50,9 @@ srv.Databases("AdventureWorks2012").Tables("Person", "Person").Columns("Modified
 Server srv;   
 srv = new Server();   
 //Modify a property using the Databases, Tables, and Columns collections to reference a column.   
-srv.Databases("AdventureWorks2012").Tables("Person", "Person").Columns("LastName").Nullable = true;   
+srv.Databases["AdventureWorks2012"].Tables["Person", "Person"].Columns["LastName"].Nullable = true;   
 //Call the Alter method to make the change on the instance of SQL Server.   
-srv.Databases("AdventureWorks2012").Tables("Person", "Person").Columns("LastName").Alter();   
+srv.Databases["AdventureWorks2012"].Tables["Person", "Person"].Columns["LastName"].Alter();   
 }  
 ```