public IConfigurationProvider Build()

in src/Microsoft.Extensions.Configuration.AzureAppConfiguration/AzureAppConfigurationSource.cs [25:72]
44 lines of code
7 McCabe index (conditional complexity)

        public IConfigurationProvider Build(IConfigurationBuilder builder)
        {
            IConfigurationProvider provider = null;

            try
            {
                AzureAppConfigurationOptions options = _optionsProvider();
                IConfigurationClientManager clientManager;

                if (options.ClientManager != null)
                {
                    clientManager = options.ClientManager;
                }
                else if (options.ConnectionStrings != null)
                {
                    clientManager = new ConfigurationClientManager(
                        options.ConnectionStrings,
                        options.ClientOptions,
                        options.ReplicaDiscoveryEnabled,
                        options.LoadBalancingEnabled);
                }
                else if (options.Endpoints != null && options.Credential != null)
                {
                    clientManager = new ConfigurationClientManager(
                        options.Endpoints,
                        options.Credential,
                        options.ClientOptions,
                        options.ReplicaDiscoveryEnabled,
                        options.LoadBalancingEnabled);
                }
                else
                {
                    throw new ArgumentException($"Please call {nameof(AzureAppConfigurationOptions)}.{nameof(AzureAppConfigurationOptions.Connect)} to specify how to connect to Azure App Configuration.");
                }

                provider = new AzureAppConfigurationProvider(clientManager, options, _optional);
            }
            catch (InvalidOperationException ex) // InvalidOperationException is thrown when any problems are found while configuring AzureAppConfigurationOptions or when SDK fails to create a configurationClient.
            {
                throw new ArgumentException(ex.Message, ex);
            }
            catch (FormatException fe) // FormatException is thrown when the connection string is not a well formed connection string.
            {
                throw new ArgumentException(fe.Message, fe);
            }

            return provider ?? new EmptyConfigurationProvider();
        }