Fixed to CamelCase.

Designer/Program.cs

@@ -120,12 +120,12 @@ namespace Designer {
 
 		private static void LoginText_MouseLeave (object sender, View.MouseEventEventArgs e)
 		{
-			((TextField)sender).Text = $"Mouse leave at X: {e.mouseEvent.X}; Y: {e.mouseEvent.Y} HasFocus: {e.mouseEvent.View.HasFocus}";
+			((TextField)sender).Text = $"Mouse leave at X: {e.MouseEvent.X}; Y: {e.MouseEvent.Y} HasFocus: {e.MouseEvent.View.HasFocus}";
 		}
 
 		private static void LoginText_MouseEnter (object sender, View.MouseEventEventArgs e)
 		{
-			((TextField)sender).Text = $"Mouse enter at X: {e.mouseEvent.X}; Y: {e.mouseEvent.Y} HasFocus: {e.mouseEvent.View.HasFocus}";
+			((TextField)sender).Text = $"Mouse enter at X: {e.MouseEvent.X}; Y: {e.MouseEvent.Y} HasFocus: {e.MouseEvent.View.HasFocus}";
 		}
 	}
 }

Terminal.Gui/Views/ComboBox.cs

@@ -90,7 +90,7 @@ namespace Terminal.Gui {
 
 		private void Search_MouseClick (object sender, MouseEventEventArgs e)
 		{
-			if (e.mouseEvent.Flags != MouseFlags.Button1Clicked)
+			if (e.MouseEvent.Flags != MouseFlags.Button1Clicked)
 				return;
 
 			SuperView.SetFocus (((View)sender));