diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2ca528e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,23 @@
+bin/
+obj/
+/packages/
+riderModule.iml
+/_ReSharper.Caches/
+
+# Rider
+.idea/
+*.sln.iml
+*.csproj.iml
+*.sln.DotSettings.user
+*.csproj.DotSettings.user
+*.sln.DotSettings
+*.csproj.DotSettings
+*.sln.DotSettings.user.DotSettings
+*.csproj.DotSettings.user.DotSettings
+*.sln.DotSettings.user.DotSettings.user
+
+/Tests/bin/
+/Tests/obj/
+
+/Lecture/bin/
+/Lecture/obj/
\ No newline at end of file
diff --git a/.idea/.idea.LectureTestingandDebug/.idea/.gitignore b/.idea/.idea.LectureTestingandDebug/.idea/.gitignore
new file mode 100644
index 0000000..d261414
--- /dev/null
+++ b/.idea/.idea.LectureTestingandDebug/.idea/.gitignore
@@ -0,0 +1,13 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Rider ignored files
+/projectSettingsUpdater.xml
+/contentModel.xml
+/modules.xml
+/.idea.LectureTestingandDebug.iml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/.idea.LectureTestingandDebug/.idea/encodings.xml b/.idea/.idea.LectureTestingandDebug/.idea/encodings.xml
new file mode 100644
index 0000000..df87cf9
--- /dev/null
+++ b/.idea/.idea.LectureTestingandDebug/.idea/encodings.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
+</project>
\ No newline at end of file
diff --git a/Lecture/Exercises/Conversion.cs b/Lecture/Exercises/Conversion.cs
new file mode 100644
index 0000000..9980e9b
--- /dev/null
+++ b/Lecture/Exercises/Conversion.cs
@@ -0,0 +1,16 @@
+namespace Lecture.Exercises;
+
+public class Conversion
+{
+    public static int StringToInt(string number)
+    {
+        int res = 0;
+
+        for (int i = 0; i < 6; i++)
+        {
+            res = res * 10 + int.Parse(number[i].ToString());
+        }
+        
+        return res;
+    }
+}
\ No newline at end of file
diff --git a/Lecture/Lecture.csproj b/Lecture/Lecture.csproj
new file mode 100644
index 0000000..2b14c81
--- /dev/null
+++ b/Lecture/Lecture.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net7.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>
diff --git a/Lecture/Program.cs b/Lecture/Program.cs
new file mode 100644
index 0000000..fa620ca
--- /dev/null
+++ b/Lecture/Program.cs
@@ -0,0 +1,2 @@
+Console.WriteLine(Lecture.Exercises.Conversion.StringToInt("123456"));
+Console.WriteLine(Lecture.Exercises.Conversion.StringToInt("342523"));
\ No newline at end of file
diff --git a/LectureTestingandDebug.sln b/LectureTestingandDebug.sln
new file mode 100644
index 0000000..267e821
--- /dev/null
+++ b/LectureTestingandDebug.sln
@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lecture", "Lecture\Lecture.csproj", "{766C00F5-5826-4FB9-B209-76C4208C7E57}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tests", "Tests\Tests.csproj", "{FEF2827B-7B2A-4DD1-B137-FA2C04914F9E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{766C00F5-5826-4FB9-B209-76C4208C7E57}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{766C00F5-5826-4FB9-B209-76C4208C7E57}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{766C00F5-5826-4FB9-B209-76C4208C7E57}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{766C00F5-5826-4FB9-B209-76C4208C7E57}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FEF2827B-7B2A-4DD1-B137-FA2C04914F9E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FEF2827B-7B2A-4DD1-B137-FA2C04914F9E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FEF2827B-7B2A-4DD1-B137-FA2C04914F9E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FEF2827B-7B2A-4DD1-B137-FA2C04914F9E}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0826216
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# Programming CM about Exception and testing
diff --git a/Tests/Tests.csproj b/Tests/Tests.csproj
new file mode 100644
index 0000000..ba8cf18
--- /dev/null
+++ b/Tests/Tests.csproj
@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net7.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+
+        <IsPackable>false</IsPackable>
+        <IsTestProject>true</IsTestProject>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0"/>
+        <PackageReference Include="xunit" Version="2.4.2"/>
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
+        <PackageReference Include="coverlet.collector" Version="3.2.0">
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
+    </ItemGroup>
+
+</Project>
diff --git a/Tests/UnitTest1.cs b/Tests/UnitTest1.cs
new file mode 100644
index 0000000..279821b
--- /dev/null
+++ b/Tests/UnitTest1.cs
@@ -0,0 +1,9 @@
+namespace Tests;
+
+public class UnitTest1
+{
+    [Fact]
+    public void Test1()
+    {
+    }
+}
\ No newline at end of file
diff --git a/Tests/Usings.cs b/Tests/Usings.cs
new file mode 100644
index 0000000..8c927eb
--- /dev/null
+++ b/Tests/Usings.cs
@@ -0,0 +1 @@
+global using Xunit;
\ No newline at end of file