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Common/DTS.Common.Core/Config/DTSConfig.cs

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+using DTS.Common.Utilities.Logging;
+using System;
+using System.Configuration;
+using System.Linq;
+// ReSharper disable InconsistentNaming
+// ReSharper disable EmptyConstructor
+
+namespace DTS.Common.Core.Config
+{
+    public static class DTSConfig
+    {
+        private static string AltConfigPath;
+        public static string AltConfigPathGet()
+        {
+            lock (MyLock)
+            {
+                return AltConfigPath;
+            }
+        }
+        public static void AltConfigPathSet(string path)
+        {
+            lock (MyLock)
+            {
+                AltConfigPath = path;
+            }
+        }
+        // static constructor
+        static DTSConfig()
+        {
+        }
+
+        public static void DTSConfigInit(string path)
+        {
+            SetAltConfigPath(path);
+        }
+        private static object MyLock = new object();
+        /// <summary>
+        /// Static variable to hold alternate configuration file
+        /// </summary>
+        private static Configuration AltConfig;
+
+        public static Configuration GetAltConfig()
+        {
+            lock (MyLock)
+            {
+                return AltConfig;
+            }
+        }
+
+        /// <summary>
+        /// Static variable to hold alternate configuration file
+        /// </summary>
+        /// <history>
+        ///  
+        /// </history>
+        public static void SetAltConfigPath(string path)
+        {
+            lock (MyLock)
+            {
+                AltConfigPath = path;
+                var dtsConfig = new ExeConfigurationFileMap
+                {
+                    ExeConfigFilename = string.IsNullOrEmpty(AltConfigPath) ? DTSConstants.CustomConfigPath : AltConfigPath
+                };
+
+                AltConfig = ConfigurationManager.OpenMappedExeConfiguration(dtsConfig, ConfigurationUserLevel.None, true);
+            }
+        }
+        /// <summary>
+        /// Static method to retrieve a setting from config file
+        /// </summary>
+        /// <param name="key">string</param>
+        /// <returns>string</returns>
+        public static string GetAppSetting(string key)
+        {
+            var appSetting = AltConfig.AppSettings.Settings.Cast<KeyValueConfigurationElement>().FirstOrDefault(setting => setting.Key == key);
+            if (appSetting == null)
+            {
+                APILogger.Log(
+                    $"## AltConfig.AppSettings.Settings.Cast<KeyValueConfigurationElement>().FirstOrDefault(setting => setting.Key == key) is null for key={key}");
+            }
+            return appSetting == null ? string.Empty : appSetting.Value;
+        }
+
+        /// <summary>
+        /// Static method to get a section from config file. Used by plugin code to get plugin library section.
+        /// </summary>
+        /// <param name="sectionName">string</param>
+        /// <returns>object</returns>
+        public static object GetSection(string sectionName)
+        {
+            var section = AltConfig.GetSection(sectionName);
+            if (section == null)
+            {
+                APILogger.Log($"## AltConfig.GetSection(sectionName) is null for sectionName={sectionName}");
+            }
+            return section;
+        }
+    }
+}