diff --git a/Animal.cs b/Animal.cs
index 909f728..7cd834a 100755
--- a/Animal.cs
+++ b/Animal.cs
@@ -2,20 +2,20 @@
 using System.Runtime.CompilerServices;
 using static System.Net.Mime.MediaTypeNames;
 
-enum _Type_Animal{
+public enum _Type_Animal{
     herbivorous,   // травоядный
     predator,      // хищник
     omnivorous,    // всеядный
     insectivorous  // насекомоядный
 }
 
-enum _Habitat{
+public enum _Habitat{
     water_env,     // водная среда
     earth_env,     // наземная среда
     wind_env       // воздушная среда
 }
 
-enum _Continent{
+public enum _Continent{
     africa,
     north_am,
     south_am,
@@ -28,71 +28,74 @@ class Animal{
 
     //-constructors-----------------------------------
     public Animal(){
-        Console.WriteLine("базовый конструктор");
+        Console.WriteLine(">>базовый конструктор");
+        _name = "пусто";
+        _age = 0;
+        _count_limbs = 0;
     }
 
     public Animal(string _name_, int _age_, int _count_limbs_, 
-        _Type_Animal type_animal, _Habitat habitat,
-        _Continent continent){
+        _Type_Animal _type_animal_, _Habitat _habitat_,
+        _Continent _continent_){
 
-        Console.WriteLine("конструктор с параметрами");
+        Console.WriteLine(">>конструктор с параметрами");
         _name = _name_;
         _age = _age_;
         _count_limbs = _count_limbs_;
 
-        Type_animal = type_animal;
-        Habitat = habitat;
-        Continent = continent;
+        type_animal = _type_animal_;
+        habitat = _habitat_;
+        continent = _continent_;
     }
 
     //-override-operators-----------------------------
-    public static bool operator ==(Animal animal_1, Animal animal_2){
+    public static bool operator ==(Animal? animal_1, Animal? animal_2){
         return ReferenceEquals(animal_1, animal_2);
     }
 
-    public static bool operator !=(Animal animal_1, Animal animal_2){
+    public static bool operator !=(Animal? animal_1, Animal? animal_2){
         return !(animal_1 == animal_2);
     }
     
     //-methods----------------------------------------
     public void GetSound(){
-        Console.WriteLine("издает звук!");
+        Console.WriteLine(" >издает звук!");
     }
 
     public void CanSwim(){
-        if (Habitat == _Habitat.water_env){
-            Console.WriteLine("животное умеет плавать!");
+        if (habitat == _Habitat.water_env){
+            Console.WriteLine(" >животное умеет плавать!");
         }
         else{
-            Console.WriteLine("животное не умеет плавать!");    
+            Console.WriteLine(" >животное не умеет плавать!");    
         }
     }
 
     public void CanFly(){
-        if (Habitat == _Habitat.wind_env){
-            Console.WriteLine("животное умеет летать!");
+        if (habitat == _Habitat.wind_env){
+            Console.WriteLine(" >животное умеет летать!");
         }
         else{
-            Console.WriteLine("животное не умеет летать!");   
+            Console.WriteLine(" >животное не умеет летать!");   
         }
     }
 
     public void ExistsTail(){
-        if (Type_animal == _Type_Animal.insectivorous){
-            Console.WriteLine("у животного нет хвоста!");
+        if (type_animal == _Type_Animal.insectivorous){
+            Console.WriteLine(" >у животного нет хвоста!");
         }
         else{
-            Console.WriteLine("у животного есть хвост!");
+            Console.WriteLine(" >у животного есть хвост!");
         }
     }
 
     public void GetAllData(){
-        Console.WriteLine("имя: " + Name);
-        Console.WriteLine("возраст: " + Age);
-        Console.WriteLine("количество конечностей: " + Count_Limbs);
-        Console.WriteLine("тип животного: " + Type_animal);
-        Console.WriteLine("среда обитания: " + Habitat);
-        Console.WriteLine("континент: " + Continent);
+        Console.WriteLine("имя: " + _name);
+        Console.WriteLine("возраст: " + _age);
+        Console.WriteLine("количество конечностей: " + _count_limbs);
+        Console.WriteLine("тип животного: " + type_animal);
+        Console.WriteLine("среда обитания: " + habitat);
+        Console.WriteLine("континент: " + continent);
     }
 
     //-public-fields----------------------------------
@@ -118,7 +121,7 @@ class Animal{
     private string _name;
     private int _age;
     private int _count_limbs;
-    private _Type_Animal Type_animal{ set; }
-    private _Habitat Habitat{ set; }
-    private _Continent Continent{ set; }
+    private _Type_Animal type_animal;
+    private _Habitat habitat;
+    private _Continent continent;
 }
\ No newline at end of file
diff --git a/Program.cs b/Program.cs
index ca2bc1e..71df188 100755
--- a/Program.cs
+++ b/Program.cs
@@ -1,50 +1,67 @@
-Console.WriteLine("дочерний класс cat:\n");
-Animal cat = new Animal("барсик", 5, 6, type_animal.predator, 
-    habitat.earth_env, continent.eurasia);
+Console.WriteLine("дочерний класс cat:");
+Animal cat = new Animal("барсик", 5, 6, _Type_Animal.predator, 
+    _Habitat.earth_env, _Continent.eurasia);
 cat.GetSound();
 cat.CanSwim();
 cat.CanFly();
 cat.ExistsTail();
-cat.GetllData();
+cat.GetAllData();
+Console.WriteLine("");
+
+Console.WriteLine("дочерний класс dog:");
+Animal dog = new Animal();
+dog.GetAllData();
+Console.WriteLine("");
 
 
-// Console.WriteLine("дочерний класс dog:\n");
-// Animal dog = new Animal();
-// dog.Get_all_data();
+Console.WriteLine("дочерний класс pigeon:");
+Animal pigeon = new Animal("голубь", 1, 5, _Type_Animal.insectivorous, _Habitat.wind_env,
+ _Continent.africa);
+pigeon.GetSound();
+pigeon.CanSwim();
+pigeon.CanFly();
+pigeon.ExistsTail();
+pigeon.GetAllData();
+Console.WriteLine("");
+
+Console.WriteLine("дочерний класс pigeon2:");
+Animal pigeon2 = new Animal("голубь_2", 0, 5, _Type_Animal.insectivorous, _Habitat.wind_env,
+ _Continent.eurasia);
+Console.WriteLine("");
 
 
-// Console.WriteLine("дочерний класс pigeon:\n");
-// Animal pigeon = new Animal("голубь", 1, 5, "wind", "insectivorous", "africa");
-// pigeon.GetSound();
-// pigeon.CanFly();
-// pigeon.CanSwim();
-// pigeon.ExistsTail();
-// pigeon.Get_all_data();
+Console.WriteLine("кот равен голубю?:");
+if (cat == pigeon)
+{
+    Console.WriteLine("да!");
+}
+else{
+    Console.WriteLine("нет!");
+}
+Console.WriteLine("");
 
-// Console.WriteLine("дочерний класс pigeon2:\n");
-// Animal pigeon2 = new Animal("голубь_2", 0, 5, "wind", "insectivorous", "eurasia");
+Console.WriteLine("голубь2 равен голубю?:");
+if (pigeon2 == pigeon)
+{
+    Console.WriteLine("да!");
+}
+else{
+    Console.WriteLine("нет!");
+}
+Console.WriteLine("");
 
+Console.WriteLine("голубь равен голубю?:");
+if (pigeon == pigeon)
+{
+    Console.WriteLine("да!");
+}
+else{
+    Console.WriteLine("нет!");
+}
+Console.WriteLine("");
 
-// Console.WriteLine("кот равен голубю?:\n");
-// if (cat == pigeon)
-// {
-//     Console.WriteLine("да!");
-// }
+Figure square = new Figure(10.5, 30.9);
+Console.WriteLine("площадь квадрата равна: " + square.Square);
 
-// Console.WriteLine("голубь2 равен голубю?:\n");
-// if (pigeon2 == pigeon)
-// {
-//     Console.WriteLine("да!");
-// }
-
-// Console.WriteLine("голубь равен голубю?:\n");
-// if (pigeon == pigeon)
-// {
-//     Console.WriteLine("да!");
-// }
-
-// Figure square = new Figure(10.5, 30.9);
-// Console.WriteLine("площадь квадрата равна: " + square.Square);
-
-// Figure trapeziod = new Figure(10.5, 30.9, 5.5);
-// Console.WriteLine("площадь трапеции равна: " + trapeziod.Square);
\ No newline at end of file
+Figure trapeziod = new Figure(10.5, 30.9, 5.5);
+Console.WriteLine("площадь трапеции равна: " + trapeziod.Square);
\ No newline at end of file
diff --git a/bin/Debug/net10.0/oop_1 b/bin/Debug/net10.0/oop_1
new file mode 100755
index 0000000..96987e6
Binary files /dev/null and b/bin/Debug/net10.0/oop_1 differ
diff --git a/bin/Debug/net10.0/oop_1.deps.json b/bin/Debug/net10.0/oop_1.deps.json
index f3d0417..9404270 100755
--- a/bin/Debug/net10.0/oop_1.deps.json
+++ b/bin/Debug/net10.0/oop_1.deps.json
@@ -1,23 +1,23 @@
-{
-  "runtimeTarget": {
-    "name": ".NETCoreApp,Version=v10.0",
-    "signature": ""
-  },
-  "compilationOptions": {},
-  "targets": {
-    ".NETCoreApp,Version=v10.0": {
-      "oop_1/1.0.0": {
-        "runtime": {
-          "oop_1.dll": {}
-        }
-      }
-    }
-  },
-  "libraries": {
-    "oop_1/1.0.0": {
-      "type": "project",
-      "serviceable": false,
-      "sha512": ""
-    }
-  }
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v10.0",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v10.0": {
+      "oop_1/1.0.0": {
+        "runtime": {
+          "oop_1.dll": {}
+        }
+      }
+    }
+  },
+  "libraries": {
+    "oop_1/1.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    }
+  }
 }
\ No newline at end of file
diff --git a/bin/Debug/net10.0/oop_1.dll b/bin/Debug/net10.0/oop_1.dll
index 50bba17..7bd6983 100755
Binary files a/bin/Debug/net10.0/oop_1.dll and b/bin/Debug/net10.0/oop_1.dll differ
diff --git a/bin/Debug/net10.0/oop_1.pdb b/bin/Debug/net10.0/oop_1.pdb
index b6f5a58..2b6257f 100755
Binary files a/bin/Debug/net10.0/oop_1.pdb and b/bin/Debug/net10.0/oop_1.pdb differ
diff --git a/bin/Debug/net10.0/oop_1.runtimeconfig.json b/bin/Debug/net10.0/oop_1.runtimeconfig.json
index 7cd647c..01e4519 100755
--- a/bin/Debug/net10.0/oop_1.runtimeconfig.json
+++ b/bin/Debug/net10.0/oop_1.runtimeconfig.json
@@ -1,12 +1,12 @@
-{
-  "runtimeOptions": {
-    "tfm": "net10.0",
-    "framework": {
-      "name": "Microsoft.NETCore.App",
-      "version": "10.0.0"
-    },
-    "configProperties": {
-      "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": false
-    }
-  }
+{
+  "runtimeOptions": {
+    "tfm": "net10.0",
+    "framework": {
+      "name": "Microsoft.NETCore.App",
+      "version": "10.0.0"
+    },
+    "configProperties": {
+      "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": false
+    }
+  }
 }
\ No newline at end of file
diff --git a/obj/Debug/net10.0/apphost b/obj/Debug/net10.0/apphost
new file mode 100755
index 0000000..96987e6
Binary files /dev/null and b/obj/Debug/net10.0/apphost differ
diff --git a/obj/Debug/net10.0/oop_1.AssemblyInfo.cs b/obj/Debug/net10.0/oop_1.AssemblyInfo.cs
index fe5f027..6975394 100755
--- a/obj/Debug/net10.0/oop_1.AssemblyInfo.cs
+++ b/obj/Debug/net10.0/oop_1.AssemblyInfo.cs
@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("oop_1")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+308f755be69bf77a9c0c1783c49f73225beec73b")]
 [assembly: System.Reflection.AssemblyProductAttribute("oop_1")]
 [assembly: System.Reflection.AssemblyTitleAttribute("oop_1")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/obj/Debug/net10.0/oop_1.AssemblyInfoInputs.cache b/obj/Debug/net10.0/oop_1.AssemblyInfoInputs.cache
index 9283025..98ac175 100755
--- a/obj/Debug/net10.0/oop_1.AssemblyInfoInputs.cache
+++ b/obj/Debug/net10.0/oop_1.AssemblyInfoInputs.cache
@@ -1 +1 @@
-f0381d2845e66a0240164ac3147a921124da832ce87f7569a7ef993e016b07c4
+4eb4b0b0170d83b7f35ba2418a4226c93c11e912f6f3e3e3bdeae7c1a0b38c77
diff --git a/obj/Debug/net10.0/oop_1.GeneratedMSBuildEditorConfig.editorconfig b/obj/Debug/net10.0/oop_1.GeneratedMSBuildEditorConfig.editorconfig
index 53101f7..74b5dc8 100755
--- a/obj/Debug/net10.0/oop_1.GeneratedMSBuildEditorConfig.editorconfig
+++ b/obj/Debug/net10.0/oop_1.GeneratedMSBuildEditorConfig.editorconfig
@@ -10,7 +10,7 @@ build_property.PlatformNeutralAssembly =
 build_property.EnforceExtendedAnalyzerRules = 
 build_property._SupportedPlatformList = Linux,macOS,Windows
 build_property.RootNamespace = oop_1
-build_property.ProjectDir = /home/ivan/oop_cs/
+build_property.ProjectDir = /home/ivan/study_oop1/
 build_property.EnableComHosting = 
 build_property.EnableGeneratedComInterfaceComImportInterop = 
 build_property.EffectiveAnalysisLevelStyle = 10.0
diff --git a/obj/Debug/net10.0/oop_1.assets.cache b/obj/Debug/net10.0/oop_1.assets.cache
index f469b2e..93c63f3 100755
Binary files a/obj/Debug/net10.0/oop_1.assets.cache and b/obj/Debug/net10.0/oop_1.assets.cache differ
diff --git a/obj/Debug/net10.0/oop_1.csproj.FileListAbsolute.txt b/obj/Debug/net10.0/oop_1.csproj.FileListAbsolute.txt
index 09779ce..18f3996 100755
--- a/obj/Debug/net10.0/oop_1.csproj.FileListAbsolute.txt
+++ b/obj/Debug/net10.0/oop_1.csproj.FileListAbsolute.txt
@@ -20,3 +20,17 @@ C:/Users/ivan/source/repos/oop_1/oop_1/obj/Debug/net10.0/oop_1.csproj.Up2Date
 /home/ivan/oop_cs/obj/Debug/net10.0/oop_1.dll
 /home/ivan/oop_cs/obj/Debug/net10.0/refint/oop_1.dll
 /home/ivan/oop_cs/obj/Debug/net10.0/oop_1.pdb
+/home/ivan/study_oop1/obj/Debug/net10.0/oop_1.GeneratedMSBuildEditorConfig.editorconfig
+/home/ivan/study_oop1/obj/Debug/net10.0/oop_1.AssemblyInfoInputs.cache
+/home/ivan/study_oop1/obj/Debug/net10.0/oop_1.AssemblyInfo.cs
+/home/ivan/study_oop1/obj/Debug/net10.0/oop_1.csproj.CoreCompileInputs.cache
+/home/ivan/study_oop1/obj/Debug/net10.0/oop_1.dll
+/home/ivan/study_oop1/obj/Debug/net10.0/refint/oop_1.dll
+/home/ivan/study_oop1/obj/Debug/net10.0/oop_1.pdb
+/home/ivan/study_oop1/bin/Debug/net10.0/oop_1
+/home/ivan/study_oop1/bin/Debug/net10.0/oop_1.deps.json
+/home/ivan/study_oop1/bin/Debug/net10.0/oop_1.runtimeconfig.json
+/home/ivan/study_oop1/bin/Debug/net10.0/oop_1.dll
+/home/ivan/study_oop1/bin/Debug/net10.0/oop_1.pdb
+/home/ivan/study_oop1/obj/Debug/net10.0/oop_1.genruntimeconfig.cache
+/home/ivan/study_oop1/obj/Debug/net10.0/ref/oop_1.dll
diff --git a/obj/Debug/net10.0/oop_1.dll b/obj/Debug/net10.0/oop_1.dll
index 50bba17..7bd6983 100755
Binary files a/obj/Debug/net10.0/oop_1.dll and b/obj/Debug/net10.0/oop_1.dll differ
diff --git a/obj/Debug/net10.0/oop_1.genruntimeconfig.cache b/obj/Debug/net10.0/oop_1.genruntimeconfig.cache
index 67fb7c7..da9cca1 100755
--- a/obj/Debug/net10.0/oop_1.genruntimeconfig.cache
+++ b/obj/Debug/net10.0/oop_1.genruntimeconfig.cache
@@ -1 +1 @@
-5f1d841fdb158f23c8226209dfda0ac0962705398855826d3e7176c01bdf7366
+9b0c8e304570150d4cc2be6848386bbcadb786f0b6b9ea4417e194d4e49b3335
diff --git a/obj/Debug/net10.0/oop_1.pdb b/obj/Debug/net10.0/oop_1.pdb
index b6f5a58..2b6257f 100755
Binary files a/obj/Debug/net10.0/oop_1.pdb and b/obj/Debug/net10.0/oop_1.pdb differ
diff --git a/obj/Debug/net10.0/ref/oop_1.dll b/obj/Debug/net10.0/ref/oop_1.dll
index a273e33..a682a07 100755
Binary files a/obj/Debug/net10.0/ref/oop_1.dll and b/obj/Debug/net10.0/ref/oop_1.dll differ
diff --git a/obj/Debug/net10.0/refint/oop_1.dll b/obj/Debug/net10.0/refint/oop_1.dll
index a273e33..a682a07 100755
Binary files a/obj/Debug/net10.0/refint/oop_1.dll and b/obj/Debug/net10.0/refint/oop_1.dll differ
diff --git a/obj/oop_1.csproj.nuget.dgspec.json b/obj/oop_1.csproj.nuget.dgspec.json
index f9c182c..fa7c4aa 100644
--- a/obj/oop_1.csproj.nuget.dgspec.json
+++ b/obj/oop_1.csproj.nuget.dgspec.json
@@ -1,17 +1,17 @@
 {
   "format": 1,
   "restore": {
-    "/home/ivan/oop_cs/oop_1.csproj": {}
+    "/home/ivan/study_oop1/oop_1.csproj": {}
   },
   "projects": {
-    "/home/ivan/oop_cs/oop_1.csproj": {
+    "/home/ivan/study_oop1/oop_1.csproj": {
       "version": "1.0.0",
       "restore": {
-        "projectUniqueName": "/home/ivan/oop_cs/oop_1.csproj",
+        "projectUniqueName": "/home/ivan/study_oop1/oop_1.csproj",
         "projectName": "oop_1",
-        "projectPath": "/home/ivan/oop_cs/oop_1.csproj",
+        "projectPath": "/home/ivan/study_oop1/oop_1.csproj",
         "packagesPath": "/home/ivan/.nuget/packages/",
-        "outputPath": "/home/ivan/oop_cs/obj/",
+        "outputPath": "/home/ivan/study_oop1/obj/",
         "projectStyle": "PackageReference",
         "configFilePaths": [
           "/home/ivan/.nuget/NuGet/NuGet.Config"
diff --git a/obj/project.assets.json b/obj/project.assets.json
index 5a96f8e..d4e41c3 100644
--- a/obj/project.assets.json
+++ b/obj/project.assets.json
@@ -13,11 +13,11 @@
   "project": {
     "version": "1.0.0",
     "restore": {
-      "projectUniqueName": "/home/ivan/oop_cs/oop_1.csproj",
+      "projectUniqueName": "/home/ivan/study_oop1/oop_1.csproj",
       "projectName": "oop_1",
-      "projectPath": "/home/ivan/oop_cs/oop_1.csproj",
+      "projectPath": "/home/ivan/study_oop1/oop_1.csproj",
       "packagesPath": "/home/ivan/.nuget/packages/",
-      "outputPath": "/home/ivan/oop_cs/obj/",
+      "outputPath": "/home/ivan/study_oop1/obj/",
       "projectStyle": "PackageReference",
       "configFilePaths": [
         "/home/ivan/.nuget/NuGet/NuGet.Config"
diff --git a/obj/project.nuget.cache b/obj/project.nuget.cache
index bd23880..66f1a82 100644
--- a/obj/project.nuget.cache
+++ b/obj/project.nuget.cache
@@ -1,8 +1,8 @@
 {
   "version": 2,
-  "dgSpecHash": "XSh8HnmCey0=",
+  "dgSpecHash": "PfCk7krDyRE=",
   "success": true,
-  "projectFilePath": "/home/ivan/oop_cs/oop_1.csproj",
+  "projectFilePath": "/home/ivan/study_oop1/oop_1.csproj",
   "expectedPackageFiles": [
     "/home/ivan/.nuget/packages/microsoft.aspnetcore.app.ref/10.0.11/microsoft.aspnetcore.app.ref.10.0.11.nupkg.sha512"
   ],