Remove System.Configuration.ConfigurationManager package reference

src/Quartz.Extensions.DependencyInjection/ServiceCollectionSchedulerFactory.cs

@@ -109,7 +109,7 @@ protected override IDbConnectionManager GetDBConnectionManager()
             return serviceProvider.GetRequiredService<IDbConnectionManager>();
         }
 
-        private protected override string GetNamedConnectionString(string connectionStringName)
+        protected override string? GetNamedConnectionString(string connectionStringName)
         {
             var configuration = serviceProvider.GetRequiredService<IConfiguration>();
             var connectionString = configuration.GetConnectionString(connectionStringName);

src/Quartz/Impl/StdSchedulerFactory.cs

@@ -22,7 +22,6 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Specialized;
-using System.Configuration;
 using System.IO;
 using System.Reflection;
 using System.Threading;
@@ -265,7 +264,7 @@ public virtual void Initialize()
 
         internal static NameValueCollection? InitializeProperties(ILog logger, bool throwOnProblem)
         {
-            var props = Util.Configuration.GetSection(ConfigurationSectionName);
+            var props = ReadConfigurationSection();
             var requestedFile = QuartzEnvironment.GetEnvironmentVariable(PropertiesFile);
             var propFileName = !string.IsNullOrWhiteSpace(requestedFile) ? requestedFile : "~/quartz.config";
 
@@ -313,6 +312,23 @@ public virtual void Initialize()
             return props;
         }
 
+        private static NameValueCollection? ReadConfigurationSection()
+        {
+#if NETFRAMEWORK
+            try
+            {
+                return (NameValueCollection) System.Configuration.ConfigurationManager.GetSection(ConfigurationSectionName);
+            }
+            catch (Exception e)
+            {
+                var log = LogProvider.GetLogger(typeof(StdSchedulerFactory));
+                log.Warn($"Could not read configuration using ConfigurationManager.GetSection: {e.Message}");
+            }
+#endif
+            return null;
+
+        }
+
         /// <summary>
         /// Creates a new name value collection and overrides its values
         /// with system values (environment variables).
@@ -820,7 +836,7 @@ private async Task<IScheduler> Instantiate()
                 ISchedulerPlugin plugin;
                 try
                 {
-                    var pluginTypeType = loadHelper.LoadType(plugInType) ?? throw new ConfigurationException($"Could not load plugin type {plugInType}");
+                    var pluginTypeType = loadHelper.LoadType(plugInType) ?? throw new SchedulerException($"Could not load plugin type {plugInType}");
                     // we need to use concrete types to resolve correct one
                     var method = GetType().GetMethod(nameof(InstantiateType), BindingFlags.Instance | BindingFlags.NonPublic)!.MakeGenericMethod(pluginTypeType);
                     plugin = (ISchedulerPlugin) method.Invoke(this, new [] { pluginTypeType })!;
@@ -1090,10 +1106,14 @@ private async Task<IScheduler> Instantiate()
             }
         }
 
-        private protected virtual string GetNamedConnectionString(string dsConnectionStringName)
+        protected virtual string? GetNamedConnectionString(string connectionStringName)
         {
-            var connectionStringSettings = ConfigurationManager.ConnectionStrings[dsConnectionStringName];
+#if NETFRAMEWORK
+            var connectionStringSettings = System.Configuration.ConfigurationManager.ConnectionStrings[connectionStringName];
             return connectionStringSettings.ConnectionString;
+#else
+            return null;
+#endif
         }
 
         protected virtual T InstantiateType<T>(Type? implementationType)

src/Quartz/Quartz.csproj

@@ -24,7 +24,6 @@
     <PackageReference Include="LibLog" Version="5.0.8" PrivateAssets="all" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="2.1.1" />
     <PackageReference Include="PolySharp" Version="1.14.1" PrivateAssets="all" />
-    <PackageReference Include="System.Configuration.ConfigurationManager" Version="6.0.1" Condition=" '$(TargetFramework)' != 'net462' and '$(TargetFramework)' != 'net472' " />
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="4.7.1" Condition=" '$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'net472' " />
   </ItemGroup>
 </Project>