Ensured, that last minute changes are written to disk

I18N Commander/UI WinForms/Components/Translation.cs

@@ -50,12 +50,6 @@ public sealed partial class Translation : UserControl
         }
     }
 
-    private async void SaveChanges(object? sender, ElapsedEventArgs e)
-    {
-        if (this.currentTranslationId > -1)
-            await TranslationProcessor.SaveChangedTranslation(this.currentTranslationId, this.textBox.Text);
-    }
-
     public async Task Configure(DataModel.Database.Translation translation)
     {
         this.isLoading = true;
@@ -78,5 +72,16 @@ public sealed partial class Translation : UserControl
             this.saveTimer.Stop();
         
         this.saveTimer.Start();
+        if(this.ParentForm is UI_WinForms.Main main)
+            main.AddDeferredSaveOperation(this.currentTranslationId, () => this.SaveChanges(null, null));
+    }
+    
+    private async void SaveChanges(object? sender, ElapsedEventArgs e)
+    {
+        if (this.currentTranslationId > -1)
+            await TranslationProcessor.SaveChangedTranslation(this.currentTranslationId, this.textBox.Text);
+        
+        if(this.ParentForm is UI_WinForms.Main main)
+            main.RemoveDeferredSaveOperation(this.currentTranslationId);
     }
 }

I18N Commander/UI WinForms/Main.Designer.cs

@@ -52,6 +52,7 @@
             this.Name = "Main";
             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
             this.Text = "I18N Commander";
+            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Main_FormClosing);
             this.ResumeLayout(false);
 
         }

I18N Commander/UI WinForms/Main.cs

@@ -2,8 +2,32 @@ namespace UI_WinForms;
 
 public partial class Main : Form
 {
+    private readonly Dictionary<int, Action> deferredSaveOperations = new();
+
     public Main()
     {
         this.InitializeComponent();
     }
+
+    private void Main_FormClosing(object sender, FormClosingEventArgs e)
+    {
+        foreach (var (_, action) in this.deferredSaveOperations)
+            action();
+        
+        this.deferredSaveOperations.Clear();
+    }
+    
+    internal void AddDeferredSaveOperation(int id, Action action)
+    {
+        if (this.deferredSaveOperations.ContainsKey(id))
+            this.deferredSaveOperations.Remove(id);
+        
+        this.deferredSaveOperations.Add(id, action);
+    }
+    
+    internal void RemoveDeferredSaveOperation(int id)
+    {
+        if (this.deferredSaveOperations.ContainsKey(id))
+            this.deferredSaveOperations.Remove(id);
+    }
 }