fixes #957

serilog/serilog#957

Author: Sergey Komisarchik

src/Serilog.Settings.Configuration/ConfigurationLoggerConfigurationExtensions.cs

@@ -17,6 +17,7 @@
 using Microsoft.Extensions.DependencyModel;
 using Serilog.Configuration;
 using Serilog.Settings.Configuration;
+using System.Reflection;
 
 namespace Serilog
 {
@@ -59,8 +60,11 @@ public static LoggerConfiguration ConfigurationSection(
         {
             if (settingConfiguration == null) throw new ArgumentNullException(nameof(settingConfiguration));
             if (configuration == null) throw new ArgumentNullException(nameof(configuration));
-
-            return settingConfiguration.Settings(new ConfigurationReader(configuration, dependencyContext ?? DependencyContext.Default));
+            
+            return settingConfiguration.Settings(
+                new ConfigurationReader(
+                    configuration,
+                    dependencyContext ?? (Assembly.GetEntryAssembly() != null ? DependencyContext.Default : null)));
         }
     }
 }

test/Serilog.Settings.Configuration.Tests/LoggerConfigurationExtensionsTests.cs

@@ -0,0 +1,18 @@
+using Microsoft.Extensions.Configuration;
+using System;
+using Xunit;
+
+namespace Serilog.Settings.Configuration.Tests
+{
+    public class LoggerConfigurationExtensionsTests
+    {
+        [Fact]
+        public void ReadFromConfigurationShouldNotThrowOnEmptyConfiguration()
+        {
+            Action act = () => new LoggerConfiguration().ReadFrom.Configuration(new ConfigurationBuilder().Build());
+
+            // should not throw
+            act();
+        }
+    }
+}

test/Serilog.Settings.Configuration.Tests/Serilog.Settings.Configuration.Tests.csproj

@@ -16,6 +16,8 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0" />
     <PackageReference Include="xunit" Version="2.2.0" />
+
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="1.0.0" />
   </ItemGroup>
 
   <ItemGroup>