Question: Get rid of NameValuePair _keyChain field in DbConnectionOptions.Common.cs

In DbConnectionOptions there are two quite similar structures to store connection string Key/Value pairs.
The main difference that I can see is only the order.
Is it really critical to show values as passed from user(password replaced with *), or it doesn't matter ?

File: DbConnectionOptions.Common.cs
Fields:
`
private readonly Dictionary _parsetable;

internal readonly NameValuePair _keyChain;
`

If I comment _keyChain - it looks to be used only in **ExpandAttachDbFileName** and **ReplacePasswordPwd**.
Both can be mimic with _parsetable.