<PackageReference Include="System.Configuration.ConfigurationManager" Version="4.4.0-preview2-25405-01" />

ProviderException

public class ProviderException : Exception
using System.Runtime.Serialization; namespace System.Configuration.Provider { public class ProviderException : Exception { public ProviderException() { } public ProviderException(string message) : base(message) { } public ProviderException(string message, Exception innerException) : base(message, innerException) { } protected ProviderException(SerializationInfo info, StreamingContext context) : base(info, context) { throw new PlatformNotSupportedException(); } } }