<PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.10" />

MemoryConfigurationProvider

public class MemoryConfigurationProvider : ConfigurationProvider, IEnumerable<KeyValuePair<string, string>>, IEnumerable
Provides configuration key-value pairs that are obtained from memory.
public MemoryConfigurationProvider(MemoryConfigurationSource source)

Initialize a new instance from the source.

public void Add(string key, string value)

Adds a new key-value pair.

public IEnumerator<KeyValuePair<string, string>> GetEnumerator()

Returns an enumerator that iterates through the collection.