Вытащил солюшен на уровень выше, чтобы прощё было дотнетить

BlazorWebAssemblyVisaApiClient/Infrastructure/Helpers/EnumExtensions.cs

@@ -0,0 +1,17 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace BlazorWebAssemblyVisaApiClient.Infrastructure.Helpers;
+
+public static class EnumExtensions
+{
+    public static string GetDisplayName(this Enum value)
+    {
+            var enumMembers = value.GetType().GetMembers();
+            var member = enumMembers.First(info => info.Name == value.ToString());
+            var displayAttribute = (DisplayAttribute?)member
+                .GetCustomAttributes(typeof(DisplayAttribute), false)
+                .FirstOrDefault();
+            var displayName = displayAttribute?.Name ?? value.ToString();
+            return displayName;
+        }
+}

BlazorWebAssemblyVisaApiClient/Infrastructure/Helpers/ValidationResultExtensions.cs

@@ -0,0 +1,21 @@
+using System.Text;
+using FluentValidation.Results;
+
+namespace BlazorWebAssemblyVisaApiClient.Infrastructure.Helpers;
+
+public static class ValidationResultExtensions
+{
+    public static string ToErrorsString(this ValidationResult validationResult)
+        => ErrorsToString(validationResult.Errors.Select(e => e.ErrorMessage));
+
+    private static string ErrorsToString(IEnumerable<string> errors)
+    {
+            var stringBuilder = new StringBuilder();
+            foreach (var error in errors)
+            {
+                stringBuilder.Append($"{error}<br/>");
+            }
+
+            return stringBuilder.ToString();
+        }
+}