Add project files.

src/common/Elsa.Mediator/CommandStrategies/BackgroundStrategy.cs

@@ -0,0 +1,19 @@
+using Elsa.Mediator.Contexts;
+using Elsa.Mediator.Contracts;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Elsa.Mediator.CommandStrategies;
+
+/// <summary>
+/// Invokes command handlers in the background and does not wait for the result.
+/// </summary>
+public class BackgroundStrategy : ICommandStrategy
+{
+    /// <inheritdoc />
+    public async Task<TResult> ExecuteAsync<TResult>(CommandStrategyContext context)
+    {
+        var commandsChannel = context.ServiceProvider.GetRequiredService<ICommandsChannel>();
+        await commandsChannel.Writer.WriteAsync(context.CommandContext, context.CancellationToken);
+        return default!;
+    }
+}