From 0914d32a5a460ced3bbb035db60b3ad1284d68eb Mon Sep 17 00:00:00 2001
From: Stanislav Mykhailenko <mykhailenkostanislavzno@gmail.com>
Date: Mon, 20 Mar 2023 12:37:59 +0200
Subject: [PATCH] Make strings non-nullable by using different variables to
 just check input

---
 Lesson_2/Task_1/Program.cs | 10 +++++++---
 Lesson_2/Task_3/Program.cs |  9 ++++++---
 Lesson_2/Task_4/Program.cs |  9 ++++++---
 3 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/Lesson_2/Task_1/Program.cs b/Lesson_2/Task_1/Program.cs
index c548bb6..9d26544 100644
--- a/Lesson_2/Task_1/Program.cs
+++ b/Lesson_2/Task_1/Program.cs
@@ -10,17 +10,21 @@ List<Product> products = new List<Product>();
 
 for (int i = 0; i < 10; i++)
 {
-    string? name;
+    string name;
     float price;
 
     while (true)
     {
         Console.Write($"Enter product {i + 1} name: ");
-        name = Console.ReadLine();
-        if (name != null)
+        string? input = Console.ReadLine();
+        if (!string.IsNullOrEmpty(input))
+        {
+            name = input;
             break;
+        }
     }
 
+
     while (true)
     {
         Console.Write($"Enter product {i + 1} price: ");
diff --git a/Lesson_2/Task_3/Program.cs b/Lesson_2/Task_3/Program.cs
index 00715a8..c4df476 100644
--- a/Lesson_2/Task_3/Program.cs
+++ b/Lesson_2/Task_3/Program.cs
@@ -20,14 +20,17 @@ List<Customer> customers = new List<Customer>()
     new Customer("Alex", 77, "Street 10")
 };
 
-string? name;
+string name;
 
 while (true)
 {
     Console.Write("Enter name: ");
-    name = Console.ReadLine();
-    if (name != null)
+    string? input = Console.ReadLine();
+    if (!string.IsNullOrEmpty(input))
+    {
+        name = input;
         break;
+    }
 }
 
 var selected = from customer in customers where customer.Name == name select customer;
diff --git a/Lesson_2/Task_4/Program.cs b/Lesson_2/Task_4/Program.cs
index b7a9489..88f45fb 100644
--- a/Lesson_2/Task_4/Program.cs
+++ b/Lesson_2/Task_4/Program.cs
@@ -21,14 +21,17 @@ List<Car> cars = new List<Car>()
     new Car("789GHI", 3),
 };
 
-string? number;
+string number;
 
 while (true)
 {
     Console.Write("Enter number: ");
-    number = Console.ReadLine();
-    if (number != null)
+    string? input = Console.ReadLine();
+    if (!string.IsNullOrEmpty(input))
+    {
+        number = input;
         break;
+    }
 }
 
 var selected = owners.FirstOrDefault(owner => cars.Any(car => car.Number == number && car.OwnerId == owner.Id));