Describe the bug

SqlConnectionStringBuilder inherits from a base class that implements ICustomTypeDescriptor, which is supposed to report the class's properties to a property inspector and make them easy to edit. Hooking one up to a SqlConnectionStringBuilder instance, however, shows several properties reported twice, where editing one of them works as expected and the other one raises data binding errors.

To reproduce

See attached project. Note that many properties are reported twice, including the all-important Data Source and Initial Catalog.

Expected behavior

Every connection string property should be reported exactly once and be editable without errors.

Further technical details

Microsoft.Data.SqlClient version: 4.8.3
.NET target: .NET 5
SQL Server version: n/a
Operating system: Windows 10