chore: Rename 2026 to 2025

AdventOfCode2025/AdventOfCode2025.csproj

@@ -5,6 +5,7 @@
         <TargetFramework>net10.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
+        <RootNamespace>AdventOfCode2025</RootNamespace>
     </PropertyGroup>
 
 </Project>

AdventOfCode2025/AdventOfCode2025.sln

@@ -1,6 +1,6 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AdventOfCode2026", "AdventOfCode2026.csproj", "{1B2A5F8D-587F-4257-9443-1951C8D0D38A}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AdventOfCode2025", "AdventOfCode2025.csproj", "{1B2A5F8D-587F-4257-9443-1951C8D0D38A}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

AdventOfCode2025/Day1.cs

@@ -1,4 +1,4 @@
-namespace AdventOfCode2026;
+namespace AdventOfCode2025;
 
 public sealed class Day1 : Solution
 {

AdventOfCode2025/Day2.cs

@@ -1,4 +1,4 @@
-namespace AdventOfCode2026;
+namespace AdventOfCode2025;
 
 public class Day2 : Solution
 {

AdventOfCode2025/InputReader.cs

@@ -1,4 +1,4 @@
-namespace AdventOfCode2026;
+namespace AdventOfCode2025;
 
 public static class InputReader
 {

AdventOfCode2025/Program.cs

@@ -1,4 +1,4 @@
-namespace AdventOfCode2026;
+namespace AdventOfCode2025;
 
 internal class Program
 {
@@ -19,7 +19,7 @@ internal class Program
     {
         var solutionText = $"Solution for Day {day.ToString().PadLeft(2, '0')}:";
         var className = $"Day{day}";
-        var classType = Type.GetType($"AdventOfCode2026.{className}");
+        var classType = Type.GetType($"AdventOfCode2025.{className}");
         if (classType == null)
         {
             Console.WriteLine($"{solutionText} is not implemented.");

AdventOfCode2025/Solution.cs

@@ -1,4 +1,4 @@
-namespace AdventOfCode2026;
+namespace AdventOfCode2025;
 
 public abstract class Solution
 {