diff --git a/2-csharp/lesson-2-projects/CsharpProjects/CsharpProjects.csproj b/2-csharp/lesson-2-projects/CsharpProjects/challenge4/CsharpProjects.csproj
similarity index 100%
rename from 2-csharp/lesson-2-projects/CsharpProjects/CsharpProjects.csproj
rename to 2-csharp/lesson-2-projects/CsharpProjects/challenge4/CsharpProjects.csproj
diff --git a/2-csharp/lesson-2-projects/CsharpProjects/Program.cs b/2-csharp/lesson-2-projects/CsharpProjects/challenge4/Program.cs
similarity index 100%
rename from 2-csharp/lesson-2-projects/CsharpProjects/Program.cs
rename to 2-csharp/lesson-2-projects/CsharpProjects/challenge4/Program.cs