diff --git a/README.md b/README.md
index 25743f8..95923f9 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
# essential-aspdotnot-web-forms-development
-This is a study practice repository following [Essential ASP.NET Web Forms Development: Full Stack Programming with C#, SQL, Ajax, and JavaScript](https://learning.oreilly.com/library/view/essential-aspnet-web/9781484257845/)
\ No newline at end of file
+This is a study practice repository following [Essential ASP.NET Web Forms Development: Full Stack Programming with C#, SQL, Ajax, and JavaScript](https://learning.oreilly.com/library/view/essential-aspnet-web/9781484257845/)
+
+Note: `.gitignore` file is generated by Gitea/GitHub.
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diff --git a/notes/1_WebApplicationDevelopment.md b/notes/1_WebApplicationDevelopment.md
new file mode 100644
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--- /dev/null
+++ b/notes/1_WebApplicationDevelopment.md
@@ -0,0 +1,9 @@
+# 1. Web Application Development
+
+## 1.1 Introduction
+
+![Processing cycle of a static Web page](imgs/493603_1_En_1_Fig2_HTML.jpg)
+
+![Processing cycle of a dynamic Web page](imgs/493603_1_En_1_Fig3_HTML.jpg)
+
+![Organization of the .NET Framework](imgs/493603_1_En_1_Fig4_HTML.jpg)
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diff --git a/src/SportsPlay/SportsPlay.sln b/src/SportsPlay/SportsPlay.sln
new file mode 100644
index 0000000..9aff2f0
--- /dev/null
+++ b/src/SportsPlay/SportsPlay.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30907.101
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SportsPlay", "SportsPlay\SportsPlay.csproj", "{279CBC3C-D23A-471C-99A1-E9B34549979A}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {279CBC3C-D23A-471C-99A1-E9B34549979A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {279CBC3C-D23A-471C-99A1-E9B34549979A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {279CBC3C-D23A-471C-99A1-E9B34549979A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {279CBC3C-D23A-471C-99A1-E9B34549979A}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {B07D9ED6-BE7C-493F-8249-E26D3F7EAF16}
+ EndGlobalSection
+EndGlobal
diff --git a/src/SportsPlay/SportsPlay/Properties/AssemblyInfo.cs b/src/SportsPlay/SportsPlay/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..2772d52
--- /dev/null
+++ b/src/SportsPlay/SportsPlay/Properties/AssemblyInfo.cs
@@ -0,0 +1,35 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("SportsPlay")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("SportsPlay")]
+[assembly: AssemblyCopyright("Copyright © 2021")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components. If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("279cbc3c-d23a-471c-99a1-e9b34549979a")]
+
+// Version information for an assembly consists of the following four values:
+//
+// Major Version
+// Minor Version
+// Build Number
+// Revision
+//
+// You can specify all the values or you can default the Revision and Build Numbers
+// by using the '*' as shown below:
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/src/SportsPlay/SportsPlay/SportsPlay.csproj b/src/SportsPlay/SportsPlay/SportsPlay.csproj
new file mode 100644
index 0000000..c74e8c2
--- /dev/null
+++ b/src/SportsPlay/SportsPlay/SportsPlay.csproj
@@ -0,0 +1,122 @@
+
+
+
+
+ Debug
+ AnyCPU
+
+
+ 2.0
+ {279CBC3C-D23A-471C-99A1-E9B34549979A}
+ {349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}
+ Library
+ Properties
+ SportsPlay
+ SportsPlay
+ v4.7.2
+ true
+
+ 44365
+
+
+
+
+
+
+
+
+ true
+ full
+ false
+ bin\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ true
+ pdbonly
+ true
+ bin\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ ..\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.1\lib\net45\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.dll
+
+
+
+
+
+
+
+
+
+
+
+ Web.config
+
+
+ Web.config
+
+
+
+ 10.0
+ $(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)
+
+
+
+
+
+
+
+
+ True
+ True
+ 63657
+ /
+ https://localhost:44365/
+ False
+ False
+
+
+ False
+
+
+
+
+
+
+ This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.
+
+
+
+
+
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diff --git a/src/SportsPlay/SportsPlay/Web.Debug.config b/src/SportsPlay/SportsPlay/Web.Debug.config
new file mode 100644
index 0000000..fae9cfe
--- /dev/null
+++ b/src/SportsPlay/SportsPlay/Web.Debug.config
@@ -0,0 +1,30 @@
+
+
+
+
+
+
+
+
+
+
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diff --git a/src/SportsPlay/SportsPlay/Web.Release.config b/src/SportsPlay/SportsPlay/Web.Release.config
new file mode 100644
index 0000000..da6e960
--- /dev/null
+++ b/src/SportsPlay/SportsPlay/Web.Release.config
@@ -0,0 +1,31 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/src/SportsPlay/SportsPlay/Web.config b/src/SportsPlay/SportsPlay/Web.config
new file mode 100644
index 0000000..1f285c5
--- /dev/null
+++ b/src/SportsPlay/SportsPlay/Web.config
@@ -0,0 +1,23 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/src/SportsPlay/SportsPlay/packages.config b/src/SportsPlay/SportsPlay/packages.config
new file mode 100644
index 0000000..55d586f
--- /dev/null
+++ b/src/SportsPlay/SportsPlay/packages.config
@@ -0,0 +1,4 @@
+
+
+
+
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