Added some initiating data for working further in this projekt

CodeFirstExistingDatabase/App.config

@@ -18,6 +18,6 @@
     </providers>
   </entityFramework>
   <connectionStrings>
-    <add name="PlutoContext" connectionString="data source=TFOACERLAP;initial catalog=PlutoCodeFirst;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />
+    <add name="PlutoContext" connectionString="data source=TOMMYASUS\SQLEXPR2017;initial catalog=PlutoCodeFirst;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />
   </connectionStrings>
 </configuration>

CodeFirstExistingDatabase/Category.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CodeFirstExistingDatabase
+{
+    public class Category
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+
+    }
+}

CodeFirstExistingDatabase/CodeFirstExistingDatabase.csproj

@@ -56,6 +56,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Author.cs" />
+    <Compile Include="Category.cs" />
     <Compile Include="Course.cs" />
     <Compile Include="Form1.cs">
       <SubType>Form</SubType>
@@ -67,6 +68,18 @@
     <Compile Include="Migrations\201911090857223_InitialModel.Designer.cs">
       <DependentUpon>201911090857223_InitialModel.cs</DependentUpon>
     </Compile>
+    <Compile Include="Migrations\201911122151493_AddCategoriesTable.cs" />
+    <Compile Include="Migrations\201911122151493_AddCategoriesTable.Designer.cs">
+      <DependentUpon>201911122151493_AddCategoriesTable.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Migrations\201911122154224_AddCategoriesTable1.cs" />
+    <Compile Include="Migrations\201911122154224_AddCategoriesTable1.Designer.cs">
+      <DependentUpon>201911122154224_AddCategoriesTable1.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Migrations\201911122203311_AddCategoryColumnToCoursesTable.cs" />
+    <Compile Include="Migrations\201911122203311_AddCategoryColumnToCoursesTable.Designer.cs">
+      <DependentUpon>201911122203311_AddCategoryColumnToCoursesTable.cs</DependentUpon>
+    </Compile>
     <Compile Include="Migrations\Configuration.cs" />
     <Compile Include="PlutoContext.cs" />
     <Compile Include="Program.cs" />
@@ -75,6 +88,15 @@
     <EmbeddedResource Include="Migrations\201911090857223_InitialModel.resx">
       <DependentUpon>201911090857223_InitialModel.cs</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="Migrations\201911122151493_AddCategoriesTable.resx">
+      <DependentUpon>201911122151493_AddCategoriesTable.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Migrations\201911122154224_AddCategoriesTable1.resx">
+      <DependentUpon>201911122154224_AddCategoriesTable1.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Migrations\201911122203311_AddCategoryColumnToCoursesTable.resx">
+      <DependentUpon>201911122203311_AddCategoryColumnToCoursesTable.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="Properties\Resources.resx">
       <Generator>ResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>

CodeFirstExistingDatabase/Course.cs

@@ -21,6 +21,8 @@ namespace CodeFirstExistingDatabase
 
         public string Description { get; set; }
 
+        public Category Category { get; set; }
+
         public int Level { get; set; }
 
         public float FullPrice { get; set; }

CodeFirstExistingDatabase/Migrations/201911122151493_AddCategoriesTable.Designer.cs

@@ -0,0 +1,29 @@
+// <auto-generated />
+namespace CodeFirstExistingDatabase.Migrations
+{
+    using System.CodeDom.Compiler;
+    using System.Data.Entity.Migrations;
+    using System.Data.Entity.Migrations.Infrastructure;
+    using System.Resources;
+    
+    [GeneratedCode("EntityFramework.Migrations", "6.2.0-61023")]
+    public sealed partial class AddCategoriesTable : IMigrationMetadata
+    {
+        private readonly ResourceManager Resources = new ResourceManager(typeof(AddCategoriesTable));
+        
+        string IMigrationMetadata.Id
+        {
+            get { return "201911122151493_AddCategoriesTable"; }
+        }
+        
+        string IMigrationMetadata.Source
+        {
+            get { return null; }
+        }
+        
+        string IMigrationMetadata.Target
+        {
+            get { return Resources.GetString("Target"); }
+        }
+    }
+}

CodeFirstExistingDatabase/Migrations/201911122151493_AddCategoriesTable.cs

@@ -0,0 +1,16 @@
+namespace CodeFirstExistingDatabase.Migrations
+{
+    using System;
+    using System.Data.Entity.Migrations;
+    
+    public partial class AddCategoriesTable : DbMigration
+    {
+        public override void Up()
+        {
+        }
+        
+        public override void Down()
+        {
+        }
+    }
+}

CodeFirstExistingDatabase/Migrations/201911122151493_AddCategoriesTable.resx

@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="Target" xml:space="preserve">
+    <value>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</value>
+  </data>
+  <data name="DefaultSchema" xml:space="preserve">
+    <value>dbo</value>
+  </data>
+</root>

CodeFirstExistingDatabase/Migrations/201911122154224_AddCategoriesTable1.Designer.cs

@@ -0,0 +1,29 @@
+// <auto-generated />
+namespace CodeFirstExistingDatabase.Migrations
+{
+    using System.CodeDom.Compiler;
+    using System.Data.Entity.Migrations;
+    using System.Data.Entity.Migrations.Infrastructure;
+    using System.Resources;
+    
+    [GeneratedCode("EntityFramework.Migrations", "6.2.0-61023")]
+    public sealed partial class AddCategoriesTable1 : IMigrationMetadata
+    {
+        private readonly ResourceManager Resources = new ResourceManager(typeof(AddCategoriesTable1));
+        
+        string IMigrationMetadata.Id
+        {
+            get { return "201911122154224_AddCategoriesTable1"; }
+        }
+        
+        string IMigrationMetadata.Source
+        {
+            get { return null; }
+        }
+        
+        string IMigrationMetadata.Target
+        {
+            get { return Resources.GetString("Target"); }
+        }
+    }
+}

CodeFirstExistingDatabase/Migrations/201911122154224_AddCategoriesTable1.cs

@@ -0,0 +1,27 @@
+namespace CodeFirstExistingDatabase.Migrations
+{
+    using System;
+    using System.Data.Entity.Migrations;
+    
+    public partial class AddCategoriesTable1 : DbMigration
+    {
+        public override void Up()
+        {
+            CreateTable(
+                "dbo.Categories",
+                c => new
+                    {
+                        Id = c.Int(nullable: false, identity: false),
+                        Name = c.String(),
+                    })
+                .PrimaryKey(t => t.Id);
+            Sql("INSERT INTO Categories VALUES (1, 'Web Development')");
+            Sql("INSERT INTO Categories VALUES (2, 'Programming Languages')");
+        }
+
+        public override void Down()
+        {
+            DropTable("dbo.Categories");
+        }
+    }
+}

CodeFirstExistingDatabase/Migrations/201911122154224_AddCategoriesTable1.resx

@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="Target" xml:space="preserve">
+    <value>H4sIAAAAAAAEAO0by27jNvBeoP8g6NQWWcvJXtrA3iJ1kiLo5oE4u+gtYCTaIUpRqkgFNop+WQ/9pP5CR2+KD1mynWx3GyyQjUnOcN4znHH++evvyY+rkDpPOOEkYlP3cDR2Hcz8KCBsOXVTsXjzvfvju6+/mpwF4cr5WJ17m50DSMan7qMQ8bHncf8Rh4iPQuInEY8WYuRHoYeCyDsaj3/wDg89DChcwOU4k9uUCRLi/AN8nEXMx7FIEb2MAkx5uQ478xyrc4VCzGPk46k7gxPnJOHibEW4ADJPkUAPiGPXOaEEAUFzTBeugxiLBBJA7vEHjuciidhyHsMConfrGMO5BaIZVM7GcXO8L0fjo4wjrwGsUPkpF1E4EOHh21JEngq+laDdWoQgxDMQtlhnXOeCnLonqXiMEtdRrzqe0SQ71iHlUQF74FhPHNRmAtaU/YOzKRVpgqcMpyJB9MC5SR8o8X/B67voN8ymLKVUphhohr3WAizdJFGME7G+xYuSj4vAdbw2nKcC1mASTMHjBRNvj1znCi5HDxTXBiHJYy6iBP+MGU6QwMENEgInLMOBc5Fqtyt3ZT+r28ACQUiuc4lW7zFbisepC7+6zjlZ4aBaKSn4wAi4IACJJMXaJVfoiSxz+pTrZlGacMxd5xbTfJ8/krjwh1Jt9/WR8yQKbyNaG0O1cz+H//2M6si4fYeSJRZtmiZeY2Gddlcg2c7uCthXu+tjd3dE0GcwPOWWU8z9hMRFjHrmu97jJ0w3CbAbxTkcv0mI3wgGSM3ENBBP6RCaPvt6aRV8d3HSygstTlr5cF+S7tDSHDUKhPfFfkONtKzFC3lvp2ABGLaLFAD4GiY+s/TUw9BUmzcZ4XZZCYS3jJL1lnmphH41uU9kcjY9n3Ae+SSnumWAhZG1qTxjgdMR2gpyGzsFmkF/JAaNwcVT9zuNbTPC2oQbhHmU68Q28SROuhlU8oeNJFvF11BV5ag2YePR6LCDU1uOGi49sGecZAaFKDwNOXgIYUI3fsJ8EiPayZUC1dNpMqnX+NWdUxxjltl7J999LpZKCf3++hrFnTcJx2ovhZsAjAAInJQ03NBURNkiXglDBIS3cxkEeel8qvozpHMsWixBEG+cUrEpzX7aCOosoSGorGcDgiKHaNC5o226u4jlxHx9nSYULJK4VTbKhCadMOQ7VfPdwaimWRKVZjzd4UdCUdCnZow2Rz24VQtXneGu0NQnOEk01ybWwbYlFm0WXgfzVaKpPahpU3lFn6rqZ3mWhtbkEsUx5DypwVWuOPOyu/VmPrzfExY4PJ8b2j41tfVNkMHREiu7UonTNNRmQagda8ULiztVV7VDgq6tysOq89nvlft0958M4bVEcg7MhVlwzisVzWx0wLzLiChKDGXRLKJpyOxZwg5dFDoyfLGiY5h4CuVaJtAEpVisKvdeWrF74jZaKWPzcK3YAJ9HK2VjREZQLvXH0Wp7yJhaG/3xla0NGVO51B+H1NuQ8UjL/XFJRYmMq6NW+WQ2bEmf2xhwVh4Mt14j1P81oDTF055iSlVwbRFVrKBfunLa1Ysp5Jc1af+oXgKYI7fBA7IyzNj6aRWyumR66aXEZH4ySRcPo8n6ZutFE6AYSJBaZeqq1IpN9UhtSHXRqRSXk7LQGzBSrRRfHHEdoP2JBFnVN19zgcNRdmA0/53OKAHTbQ5cIkYWmIuieeUejQ+PlHHsf2c06nEe0F7z0Rfvv5FMphs7bAPnFXLLjT2hxH9EyTchWn0rY+rfVrMN9b4MYbUmZwOk1Ws6thO+1gQs533X+VeCEd19+pWTorWNLliAV1P3jxzq2Ln49b4GPHCuEwgZx87Y+XNPJqgloc/W/p7dWY2F0au4bOIy1zj95NVVquinzUXEZglLtwxzyBrQ5pD9AmZJ9rC7C6gBF2815DGWmlpvtMeE4lArca/ZKaZYYOfEL+qYGeI+CnRxZSVg9/15Y1ojYfNcaNs5ibVVs/fBiPWFMNhd9j8M6TYc03tAUpyqMoOyviiT6avCF7UX+6vrBYxl0KR199Fq70i111nqy+n8s5mW6kMSS29M+bKXdRpaPLWnbvAQgXqL/GcZcFlGpR2TUhNy29zLMEa1TVFNaI2DRMt8dd05XTUSLQ1mewnFTL20Z+HBJp1NM956Ttk56rX0vgyOrk9INg95JZ6VBt3uA17TGLmbVXNLTU2iSi/90zK59ym2YWzdg8Ue2t/PlFpvEEK8lP4yA4I1J8sGRfZ3Ggz7rUhZn7lgi6iK2QpF1RHl6XCJBQogjJ4kgiyQL2Dbx5zn3wn7iGgKR87CBxxcsOtUxKkAlnH4QFtfwMgCf9f9+Si+TfPkOm/K8H2wAGQSYAFfs59SQoOa7nPDC8aCIsso5Ys406XIXsbLdY3pKmI9EZXiqxPhHQ5jCsj4NZujJ7wNbR84fo+XyF9XfV47ks2KaIt9ckrQMkEhL3E08PARbDgIV+/+BWEWzX+gNAAA</value>
+  </data>
+  <data name="DefaultSchema" xml:space="preserve">
+    <value>dbo</value>
+  </data>
+</root>

CodeFirstExistingDatabase/Migrations/201911122203311_AddCategoryColumnToCoursesTable.Designer.cs

@@ -0,0 +1,29 @@
+// <auto-generated />
+namespace CodeFirstExistingDatabase.Migrations
+{
+    using System.CodeDom.Compiler;
+    using System.Data.Entity.Migrations;
+    using System.Data.Entity.Migrations.Infrastructure;
+    using System.Resources;
+    
+    [GeneratedCode("EntityFramework.Migrations", "6.2.0-61023")]
+    public sealed partial class AddCategoryColumnToCoursesTable : IMigrationMetadata
+    {
+        private readonly ResourceManager Resources = new ResourceManager(typeof(AddCategoryColumnToCoursesTable));
+        
+        string IMigrationMetadata.Id
+        {
+            get { return "201911122203311_AddCategoryColumnToCoursesTable"; }
+        }
+        
+        string IMigrationMetadata.Source
+        {
+            get { return null; }
+        }
+        
+        string IMigrationMetadata.Target
+        {
+            get { return Resources.GetString("Target"); }
+        }
+    }
+}

CodeFirstExistingDatabase/Migrations/201911122203311_AddCategoryColumnToCoursesTable.cs

@@ -0,0 +1,23 @@
+namespace CodeFirstExistingDatabase.Migrations
+{
+    using System;
+    using System.Data.Entity.Migrations;
+    
+    public partial class AddCategoryColumnToCoursesTable : DbMigration
+    {
+        public override void Up()
+        {
+            AddColumn("dbo.Courses", "Category_Id", c => c.Int());
+            CreateIndex("dbo.Courses", "Category_Id");
+            AddForeignKey("dbo.Courses", "Category_Id", "dbo.Categories", "Id");
+            Sql("UPDATE Courses SET Category_Id = 1");
+        }
+        
+        public override void Down()
+        {
+            DropForeignKey("dbo.Courses", "Category_Id", "dbo.Categories");
+            DropIndex("dbo.Courses", new[] { "Category_Id" });
+            DropColumn("dbo.Courses", "Category_Id");
+        }
+    }
+}

CodeFirstExistingDatabase/Migrations/201911122203311_AddCategoryColumnToCoursesTable.resx

@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="Target" xml:space="preserve">
+    <value>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</value>
+  </data>
+  <data name="DefaultSchema" xml:space="preserve">
+    <value>dbo</value>
+  </data>
+</root>

CodeFirstExistingDatabase/PlutoContext.cs

@@ -15,6 +15,7 @@ namespace CodeFirstExistingDatabase
         public virtual DbSet<Author> Authors { get; set; }
         public virtual DbSet<Course> Courses { get; set; }
         public virtual DbSet<Tag> Tags { get; set; }
+        public virtual DbSet<Category> Categories { get; set; }
 
         protected override void OnModelCreating(DbModelBuilder modelBuilder)
         {