Install NuGet package Entity Framework Core 9.0.3 version in solution.

dotnet new web
dotnet new classlib -o EntityFrameworkCore.Data
dotnet new classlib -o EntityFrameworkCore.Domain
dotnet sln add EntityFrameworkCore.Data/EntityFrameworkCore.Data.csproj
dotnet sln add EntityFrameworkCore.Domain/EntityFrameworkCore.Domain.csproj

EntityFrameworkCore.Data/Class1.cs

@@ -0,0 +1,6 @@
+namespace EntityFrameworkCore.Data;
+
+public class Class1
+{
+
+}

EntityFrameworkCore.Data/EntityFrameworkCore.Data.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

EntityFrameworkCore.Domain/BaseDomainModel.cs

@@ -0,0 +1,6 @@
+namespace EntityFrameworkCore.Domain;
+// Since C#11, you do not need to wrap in accolades anymore.
+public abstract class BaseDomainModel
+{
+  public DateTime CreatedDate { get; set;}
+}

EntityFrameworkCore.Domain/Coach.cs

@@ -0,0 +1,8 @@
+namespace EntityFrameworkCore.Domain;
+// Since C#11, you do not need to wrap in accolades anymore.
+public class Coach : BaseDomainModel
+{
+  public int Id { get; set; } // Anything called "Id" is automatically a Primary Key.
+  public string Name { get; set; } // Strings are automatically become VARCHAR database types.
+}
+

EntityFrameworkCore.Domain/EntityFrameworkCore.Domain.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

EntityFrameworkCore.Domain/Team.cs

@@ -0,0 +1,7 @@
+namespace EntityFrameworkCore.Domain;
+// Since C#11, you do not need to wrap in accolades anymore.
+public class Team : BaseDomainModel
+{
+  public int TeamId { get; set;} // This naming convention also allows EF to see this as a PK.
+  public string? Name { get; set; }
+}

README.md

@@ -0,0 +1,34 @@
+# Entity Framework - Dead Ball Zone
+This is a practice project to learn Entity Framework.
+
+Using the 1998 game [Dead Ball Zone](https://en.wikipedia.org/wiki/Dead_Ball_Zone) for inspiration.
+
+## .NET commands:
+
+### NuGet commands
+
+Install [Entity Framework Core NuGet package](https://www.nuget.org/packages/microsoft.entityframeworkcore):
+
+`dotnet add package Microsoft.EntityFrameworkCore --version 9.0.3`
+
+### Creation commands
+
+To list all available templates:
+
+`dotnet new -l`
+
+New class:
+
+`dotnet new class -n MyClass`
+
+adding to an existing solution:
+
+`dotnet sln add Data/Data.csproj`
+
+
+## Terms
+
+A **database-context** is an abstraction of the database structure in code.
+* It lists the models and their database table names.
+* It instantiates a database connection during the runtime of the application.
+* Allows configurations to be made in code. 

ef-1.sln

@@ -1,9 +1,13 @@
-Microsoft Visual Studio Solution File, Format Version 12.00
+Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.5.2.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "entity-framework", "entity-framework.csproj", "{F651371C-C6DF-B407-B9D0-5E6C224D4CD2}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EntityFrameworkCore.Data", "EntityFrameworkCore.Data\EntityFrameworkCore.Data.csproj", "{EB2B89D9-FE82-47CC-877F-223A4CA1755E}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EntityFrameworkCore.Domain", "EntityFrameworkCore.Domain\EntityFrameworkCore.Domain.csproj", "{DC955178-72C3-4574-86DE-1D966E38780E}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -14,6 +18,14 @@ Global
 		{F651371C-C6DF-B407-B9D0-5E6C224D4CD2}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F651371C-C6DF-B407-B9D0-5E6C224D4CD2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{F651371C-C6DF-B407-B9D0-5E6C224D4CD2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EB2B89D9-FE82-47CC-877F-223A4CA1755E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EB2B89D9-FE82-47CC-877F-223A4CA1755E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EB2B89D9-FE82-47CC-877F-223A4CA1755E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EB2B89D9-FE82-47CC-877F-223A4CA1755E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{DC955178-72C3-4574-86DE-1D966E38780E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DC955178-72C3-4574-86DE-1D966E38780E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DC955178-72C3-4574-86DE-1D966E38780E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DC955178-72C3-4574-86DE-1D966E38780E}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

entity-framework.csproj

@@ -7,4 +7,8 @@
     <RootNamespace>entity_framework</RootNamespace>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.3" />
+  </ItemGroup>
+
 </Project>