added Echo controller

Author: Bob Crowley

PostmanDelivers.API/Controllers/EchoController.cs

@@ -0,0 +1,17 @@
+using Microsoft.AspNetCore.Mvc;
+using System.Collections.Generic;
+
+namespace PostmanDelivers.API.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class EchoController : ControllerBase
+    {
+        [HttpPost]
+        [Consumes("application/x-www-form-urlencoded")]
+        public ActionResult Post([FromForm] Dictionary<string, string> stringsToEcho)
+        {
+            return Ok(stringsToEcho);
+        }
+    }
+}

PostmanDelivers.sln

@@ -9,6 +9,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TikTakToe.Engine.Tests", "T
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{C2E67A42-FE57-4B29-831D-376F569A87E8}"
 	ProjectSection(SolutionItems) = preProject
+		.gitignore = .gitignore
 		CustomScript.js = CustomScript.js
 		Database.sql = Database.sql
 		Postman Delivers.postman_globals.json = Postman Delivers.postman_globals.json