rename project

TestConsoleApp.sln

@@ -3,11 +3,11 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.1.32319.34
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestConsoleApp", "TestConsoleApp\TestConsoleApp.csproj", "{22DE263D-AF86-4C77-9132-F033640E6A7C}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Stack", "TestConsoleApp\Stack.csproj", "{22DE263D-AF86-4C77-9132-F033640E6A7C}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SortSimple", "SortSimple\SortSimple.csproj", "{92D14280-5129-478F-BA6F-9108104CD3E2}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SortStrong", "SortStrong\SortStrong.csproj", "{847595B8-07DC-49B8-A52F-1D6175B75AD9}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SortStrong", "SortStrong\SortStrong.csproj", "{847595B8-07DC-49B8-A52F-1D6175B75AD9}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

TestConsoleApp/Book.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace TestConsoleApp
+namespace Stack
 {
     internal class Book
     {

TestConsoleApp/NodeBook.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace TestConsoleApp
+namespace Stack
 {
     internal class NodeBook
     {

TestConsoleApp/Program.cs

@@ -1,4 +1,4 @@
-using TestConsoleApp;
+using Stack;
 
 StackBooksOfList stack = new StackBooksOfList();
 Book book1 = new Book();

TestConsoleApp/StackBooksOfArray.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace TestConsoleApp
+namespace Stack
 {
     internal class StackBooksOfArray
     {

TestConsoleApp/StackBooksOfList.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace TestConsoleApp
+namespace Stack
 {
     internal class StackBooksOfList
     {
@@ -14,7 +14,7 @@ namespace TestConsoleApp
         /// Возвращает элемент из стека
         /// </summary>
         /// <returns>Экземпляр книги</returns>
-        public static Book? pop()
+        public Book? pop()
         {
             if (firstBook == null)
             {