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ExC.Exception/ExC.Exception.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

ExC.Exception/Program.cs

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+class MyException : Exception
+{
+    public string MyMessage = string.Empty;
+    public MyException(string message, Exception ex) :base(ex.Message)
+    {
+        MyMessage = message;
+    }
+}
+
+internal class Program
+{
+    static void Step1()
+    {
+        throw new IndexOutOfRangeException();
+    }
+    static void Step2()
+    {
+        throw new FileNotFoundException();
+    }
+    static void Step3()
+    {
+        throw new Exception();
+    }
+    static bool Log(Exception ex)
+    {
+        Console.WriteLine($"{DateTime.Now.ToString("yy/MM/dd HH:mm:ss")} - {ex.Message}");
+        return true;
+    }
+
+    private static void Main(string[] args)
+    {
+        try
+        {
+            // 실행 문장들
+            Step1();
+            Step2();
+            Step3();
+        }
+        catch (IndexOutOfRangeException ex)
+        {
+            // 새로운 Exception 생성하여 throw
+            throw new MyException("Invalid index", ex);
+        }
+        catch (FileNotFoundException ex)
+        {
+            bool success = Log(ex);
+            if (!success)
+            {
+                // 기존 Exception을 throw
+                throw ex;
+            }
+        }
+        catch (Exception ex)
+        {
+            Log(ex);
+            // 발생된 Exception을 그대로 호출자에 전달
+            throw;
+        }
+        finally
+        {
+            //TODO 사용한 메모리 정리 코드
+        }
+    }
+}