Update C# examples for ja-JP and en-US DateTimeFormatInfo (#10141)

Author: matouskozak

snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/Project.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Library</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
 </Project>

snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/dtfi_fulldatetimepattern.cs

@@ -23,11 +23,11 @@ public static void PrintPattern( String myCulture )  {
 }
 
 /*
-This code produces the following output.  The question marks take the place of native script characters.
+This code produces the following output. Note that the exact output format depends on the OS, the OS version, and the native globalization library used by the OS.
 
  CULTURE    PROPERTY VALUE
-  en-US     dddd, MMMM dd, yyyy h:mm:ss tt
-  ja-JP     yyyy'年'M'月'd'日' H:mm:ss
+  en-US     dddd, MMMM d, yyyy h:mm:ss tt
+  ja-JP     yyyy年M月d日dddd H:mm:ss
   fr-FR     dddd d MMMM yyyy HH:mm:ss
 
 */

snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/Project.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+   
+</Project>

snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/dtfi_longdatepattern.cs

@@ -23,11 +23,11 @@ public static void PrintPattern( String myCulture )  {
 }
 
 /*
-This code produces the following output:
+This code produces the following output. Note that the exact output format depends on the OS, the OS version, and the native globalization library used by the OS.
 
  CULTURE    PROPERTY VALUE
   en-US     dddd, MMMM d, yyyy
-  ja-JP     yyyy'年'M'月'd'日'
+  ja-JP     yyyy年M月d日dddd
   fr-FR     dddd d MMMM yyyy
 
 */

snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/longdatepattern1.cs

@@ -2,7 +2,7 @@
 using System;
 using System.Globalization;
 
-public class Example
+public class Example1
 {
    public static void Main()
    {

snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/longdatepattern2.cs

@@ -3,7 +3,7 @@
 using System.Globalization;
 using System.IO;
 
-public class Example
+public class Example2
 {
    public static void Main()
    {

snippets/csharp/System.Globalization/DateTimeFormatInfo/MonthDayPattern/Project.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Library</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
 </Project>

snippets/csharp/System.Globalization/DateTimeFormatInfo/MonthDayPattern/dtfi_monthdaypattern.cs

@@ -23,11 +23,11 @@ public static void PrintPattern( String myCulture )  {
 }
 
 /*
-This code produces the following output.  The question marks take the place of native script characters.
+This code produces the following output. Note that the exact output format depends on the OS, the OS version, and the native globalization library used by the OS.
 
  CULTURE    PROPERTY VALUE
-  en-US     MMMM dd
-  ja-JP     M'?'d'?'
+  en-US     MMMM d
+  ja-JP     M月d日
   fr-FR     d MMMM
 
 */