Allows to substitute variables from configuration, this way hostnames, or passwords can be separated and automatically substituted if another configuration entry references them.
Scenarios could be that you have the password from an Azure KeyVault and the connection string defined in...
Source code package. An extension which parses the values of the given IDictionary<string,object> and replaces any tokens referencing keys from itself, and then adds all such values to environment variables if they were not already there.
VB.NET source file that contains an extension method that replaces accented characters within a string through non-accented ones, which is useful to create logon names, email addresses etc.
German upper-case umlauts like "Ä" are converted either to "Ae" or "AE" depending the context, "ß"...