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Kreta.MessageBroker/Configuration/MessageBrokerConfigurationSection.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using Kreta.Core.MessageBroker.Azure.EventHub.Client.Configuration;
+
+namespace Kreta.MessageBroker.Configuration
+{
+    /// <summary>
+    /// Message client configuration section
+    /// </summary>
+    public class MessageBrokerConfigurationSection : ConfigurationSection, IMessageBrokerConfiguration, IAzureEventHubClientsConfiguration
+    {
+        /// <summary>
+        /// Name of section
+        /// </summary>
+        const string SectionName = "MessageBroker";
+
+        /// <summary>
+        /// The instance
+        /// </summary>
+        static Lazy<MessageBrokerConfigurationSection> instance;
+
+        /// <summary>
+        /// Gets the instance.
+        /// </summary>
+        /// <value>
+        /// The instance.
+        /// </value>
+        public static MessageBrokerConfigurationSection Instance
+        {
+            get
+            {
+                return instance.Value;
+            }
+        }
+
+        /// <summary>
+        /// Clients
+        /// </summary>
+        [ConfigurationProperty(nameof(Clients))]
+        [ConfigurationCollection(typeof(MessageClientConfigurationElement))]
+        public MessageClientConfigurationElementCollection Clients
+        {
+            get
+            {
+                return (MessageClientConfigurationElementCollection)base[nameof(Clients)];
+            }
+        }
+
+        /// <summary>
+        /// Clients
+        /// </summary>
+        [ConfigurationProperty(nameof(EventHubs))]
+        [ConfigurationCollection(typeof(EventHubClientConfigurationElement))]
+        public EventHubClientConfigurationElementCollection EventHubs
+        {
+            get
+            {
+                return (EventHubClientConfigurationElementCollection)base[nameof(EventHubs)];
+            }
+        }
+
+        IEnumerable<IAzureEventHubClientConfiguration> IAzureEventHubClientsConfiguration.EventHubs => this.EventHubs;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MessageBrokerConfigurationSection"/> class.
+        /// </summary>
+        static MessageBrokerConfigurationSection()
+        {
+            instance = new Lazy<MessageBrokerConfigurationSection>(() =>
+            {
+                var section = (MessageBrokerConfigurationSection)ConfigurationManager.GetSection(SectionName);
+
+                if (section == null)
+                {
+                    throw new ConfigurationErrorsException($"{SectionName} configuration section was not found");
+                }
+
+                return section;
+            });
+        }
+    }
+}