Intermezzo–options for loading multiple providers of data – part 10

We have 2 national banks –  and we gather exchange rates from there. What if we want to add more banks  -or let other programmers to add their dll’s to our software to just display the exchange rates from other banks ?


Option 1: HardCode all the list

var l = new List<IExchangeRates[]>
new GetFirstBank()),
new GetSecondBank()),


Option 2: Reading from some config file the list of classes – letting DevOps to modify the config file

var l = new List<IExchangeRates[]>;

foreach(var line in File.ReadAllLines(“myListOfExchangeRates.txt”){

IExchangeRates r= Activator.CreateInstance(Type.GetType(line)) as IExchangeRates ;

l.Add ( r );


Option 3: Reflection – in the current assembly or in all assemblies to load the classes that implements the interface to load the data

var typeToFound = typeof(IExchangeRates);
Assembly a = Assembly.GetExecutingAssembly();
var types = a.GetTypes()
.Where(it => it.GetInterface(typeToFound.FullName)!=null)
foreach(var t in types)
recognizes.Add(Activator.CreateInstance(t)as  IExchangeRates);

Option4 Load as plugins

use the library from  and there are 2 lines , basically:

var loader = new LoadExchangeProviders("plugins");
var exchange = loader.LoadExchangeProviders().ToArray();


And one hour passes...
(This is the result of 1 hour per day auto-challenge as a full cycle developer for an exchange rates application)
( You can see the sources at )
2Reading NBR from internet
3Source control and build
4Badge and test
5CI and action
6Artifacts and dotnet try
7Docker with .NET Try
9Intermezzo - Various implementations for programmers
10Intermezzo - similar code - options
11Plugin implementation
12GUI for console
14Plugin in .NET Core 3
15Build and Versioning
16Add swagger
17Docker - first part
18Docker - second part
19Docker - build Azure
20Pipeline send to Docker Hub
21Play with Docker - online
22Run VSCode and Docker
23Deploy Azure
24VSCode see tests and powershell
25Code Coverage
26Database in Azure
27Sql In Memory or Azure
28Azure ConString, RSS
29Middleware for backward compatibility
30Identical Tables in EFCore
31Multiple Data in EFCore
32Dot net try again
33Start Azure Function
34Azure function - deploy
35Solving my problems
36IAsyncEnumerable transformed to IEnumerable and making Azure Functions works
37Azure functions - final
38Review of 37 hours
39Last Commit in AzureDevOps
40Create Angular WebSite
41Add static Angular to WebAPI .NET Core
42Docker for Angular
43Angular and CORS
44SSL , VSCode, Docker
45Routing in Angular
46RxJS for Routing
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