Добавил логику загрузки файла (или аватарки Person)

MyCities/Controllers/PersonController.cs

+using System.IO;
 using Microsoft.AspNetCore.Mvc;
+using MyCities.Models;
 using MyCities.Repositories;
+using MyCities.ViewModels;
 
 namespace MyCities.Controllers
 {
@@ -12,10 +15,26 @@ namespace MyCities.Controllers
             _repository = repository;
         }
 
-        // GET
         public IActionResult Index()
         {
             return View(_repository.Persons);
         }
+
+        [HttpGet]
+        public IActionResult Create()
+        {
+            return View();
+        }
+
+        [HttpPost]
+        public IActionResult Create(PersonCreateViewModel viewModel)
+        {
+            using (var stream = new FileStream(viewModel.GetFilePath(), FileMode.Create))
+            {
+                viewModel.Avatar.CopyTo(stream);
+            }
+            _repository.Add(viewModel.GetPerson());
+            return RedirectToAction("Index");
+        }
     }
 }

MyCities/ViewModels/PersonCreateViewModel.cs

+using System.IO;
+using Microsoft.AspNetCore.Http;
+using MyCities.Models;
+
+namespace MyCities.ViewModels
+{
+    public class PersonCreateViewModel
+    {
+        public string FullName { get; set; }
+        public string NickName { get; set; }
+        public IFormFile Avatar { get; set; }
+
+        public string GetFilePath()
+        {
+            return Path.Combine(
+                Directory.GetCurrentDirectory(),
+                "wwwroot",
+                "images",
+                Avatar.FileName
+            );
+        }
+
+        public string GetAvatarImagePath()
+        {
+            return Path.Combine(
+                "images",
+                Avatar.FileName
+            );
+        }
+
+        public Person GetPerson()
+        {
+            return new Person
+            {
+                FullName = FullName,
+                NickName = NickName,
+                AvatarImagePath = GetAvatarImagePath()
+            };
+        }
+    }
+}

MyCities/Views/Home/Create.cshtml

@@ -19,7 +19,4 @@
     </div>
 
     <button type="submit" hlp-color="primary">Create</button>
-    <mysuperbtn></mysuperbtn>
-    <button type="submit" class="btn btn-primary">Clear</button>
-    <a asp-controller="Home" asp-actoin="Index" class="btn btn-primary">Cancel</a>
 </form>

MyCities/Views/Person/Create.cshtml

+@{
+    Layout = "_Layout";
+}
+
+<form asp-controller="Person" asp-action="Create" method="post" enctype="multipart/form-data">
+    <div class="form-group">
+        <label for="FullName">FullName:</label>
+        <input class="form-control" name="FullName"/>
+    </div>
+    <div class="form-group">
+        <label for="Nickname">Nickname:</label>
+        <input class="form-control" name="Nickname"/>
+    </div>
+
+    <div class="form-group">
+        <label for="Avatar">Avatar</label>
+        <input type="file" class="form-control-file" name="Avatar">
+    </div>
+
+    <button type="submit" hlp-color="primary">Create</button>
+</form>