Update Entity-Framework-Core-Oracle.md

docs/en/Entity-Framework-Core-Oracle.md

@@ -22,19 +22,19 @@ Find `UseSqlServer()` calls in your solution, replace with `UseOracle()`. Check
 
 In the `CreateDbContext()` method of the *YourProjectName*MigrationsDbContextFactory.cs, replace the following code block
 
-```
+```csharp
 var builder = new DbContextOptionsBuilder<YourProjectNameMigrationsDbContext>()
                 .UseSqlServer(configuration.GetConnectionString("Default"));
 ```
 
 with this one
-```
+```csharp
 var builder = (DbContextOptionsBuilder<YourProjectNameMigrationsDbContext>)
 	new DbContextOptionsBuilder<YourProjectNameMigrationsDbContext>().UseOracle
 	(
 		configuration.GetConnectionString("Default")
 	);
-``` 
+```
 
 > Depending on your solution structure, you may find more code files need to be changed.
 
@@ -44,11 +44,6 @@ Oracle connection strings are different than SQL Server connection strings. So,
 
 You typically will change the `appsettings.json` inside the `.DbMigrator` and `.Web` projects, but it depends on your solution structure.
 
-A sample connection string for Oracle:
-```
-Data Source=localhost;User Id=myuser;Password=mypassword;
-```
-
 ## Re-Generate the Migrations
 
 The startup template uses [Entity Framework Core's Code First Migrations](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/) by default.