Add project files.

FunctionApp1/Function1.cs

@@ -0,0 +1,23 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Azure.Functions.Worker;
+using Microsoft.Extensions.Logging;
+
+namespace FunctionApp1;
+
+public class Function1
+{
+    private readonly ILogger<Function1> _logger;
+
+    public Function1(ILogger<Function1> logger)
+    {
+        _logger = logger;
+    }
+
+    [Function("Function1")]
+    public IActionResult Run([HttpTrigger(AuthorizationLevel.Function, "get", "post")] HttpRequest req)
+    {
+        _logger.LogInformation("C# HTTP trigger function processed a request.");
+        return new OkObjectResult("Welcome to Azure Functions!");
+    }
+}