Allowing static license key values

Directory.Build.props

@@ -4,7 +4,7 @@
     <IsWindows>$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::get_Windows())))</IsWindows>
 
     <LangVersion>13.0</LangVersion>
-    <NoWarn>$(NoWarn);CS1701;CS1702;CS1591</NoWarn>
+    <NoWarn>$(NoWarn);CS1701;CS1702;CS1591;NU1900</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 </Project>

README.md

@@ -99,4 +99,15 @@ services.AddMediatR(cfg =>
 })
 ```
 
+Or if not using Microsoft.Extensions.DependencyInjection:
+
+```csharp
+Mediator.LicenseKey = "<license key here>";
+```
+
+> [!TIP]
+> The license key does not need to be set on client applications (such as Blazor WASM).
+> Turn off the license warning by configuring logging in your logging start configuration:
+> `builder.Logging.AddFilter("LuckyPennySoftware.AutoMapper.License", LogLevel.None);`
+
 You can register for your license key at [MediatR.io](https://mediatr.io)

src/MediatR/Licensing/LicenseAccessor.cs

@@ -12,13 +12,18 @@ namespace MediatR.Licensing;
 
 internal class LicenseAccessor
 {
-    private readonly MediatRServiceConfiguration _configuration;
+    private readonly MediatRServiceConfiguration? _configuration;
     private readonly ILogger _logger;
 
     public LicenseAccessor(MediatRServiceConfiguration configuration, ILoggerFactory loggerFactory)
     {
         _configuration = configuration;
         _logger = loggerFactory.CreateLogger("LuckyPennySoftware.MediatR.License");
+    }   
+
+    public LicenseAccessor(ILoggerFactory loggerFactory)
+    {
+        _logger = loggerFactory.CreateLogger("LuckyPennySoftware.MediatR.License");
     }
 
     private License? _license;
@@ -35,7 +40,10 @@ private License Initialize()
                 return _license;
             }
 
-            var key = _configuration.LicenseKey;
+            var key = _configuration?.LicenseKey
+                      ?? Mediator.LicenseKey
+                      ?? null;
+
             if (key == null)
             {
                 return new License();

src/MediatR/Mediator.cs

@@ -42,6 +42,11 @@ public Mediator(IServiceProvider serviceProvider, INotificationPublisher publish
         _serviceProvider.CheckLicense();
     }
 
+    /// <summary>
+    /// Gets or sets the license key. You can find your license key in your <a href="https://luckypennysoftware.com/account">account</a>.
+    /// </summary>
+    public static string? LicenseKey { get; set; }
+
     public Task<TResponse> Send<TResponse>(IRequest<TResponse> request, CancellationToken cancellationToken = default)
     {
         if (request == null)

test/MediatR.Tests/Licensing/LicenseValidatorTests.cs

@@ -140,4 +140,27 @@ public void Should_return_valid_for_actual_valid_license()
         logMessages
             .ShouldNotContain(log => log.Level == LogLevel.Error);
     }
+
+    [Fact(Skip = "Needs license")]
+    public void Should_return_valid_for_actual_valid_license_via_static_property()
+    {
+        var factory = new LoggerFactory();
+        var provider = new FakeLoggerProvider();
+        factory.AddProvider(provider);
+
+        Mediator.LicenseKey = "<>";
+        var licenseAccessor = new LicenseAccessor(factory);
+
+        var licenseValidator = new LicenseValidator(factory);
+        var license = licenseAccessor.Current;
+
+        license.IsConfigured.ShouldBeTrue();
+
+        licenseValidator.Validate(license);
+
+        var logMessages = provider.Collector.GetSnapshot();
+
+        logMessages
+            .ShouldNotContain(log => log.Level == LogLevel.Error);
+    }
 }