diff --git a/SyntaxTree/tree/TreeHelper.cs b/SyntaxTree/tree/TreeHelper.cs
index 0f19434bd..873cdee35 100644
--- a/SyntaxTree/tree/TreeHelper.cs
+++ b/SyntaxTree/tree/TreeHelper.cs
@@ -769,6 +769,11 @@ namespace PascalABCCompiler.SyntaxTree
                     sb.Append(" " + pa.ToString() + " ");
             return sb.ToString();
         }
+
+        bool is_extension()
+        {
+            return proc_attributes.proc_attributes.FindIndex(attr => attr.attribute_type == proc_attribute.attr_extension) >=0;
+        }
     }
 
     public partial class function_header
diff --git a/TestSuite/ExtPropAssignTuple.pas b/TestSuite/ExtPropAssignTuple.pas
new file mode 100644
index 000000000..12367ba53
--- /dev/null
+++ b/TestSuite/ExtPropAssignTuple.pas
@@ -0,0 +1,14 @@
+type
+  TClass = class
+  private
+    fX, fY: integer;
+    
+  public
+    property X: integer write (fX, fY) := (3, 4);
+  end;
+
+begin
+  var d := TClass.Create;
+  d.X := 55;
+  Assert(d.fX=3);
+end.
\ No newline at end of file
diff --git a/TestSuite/foreach_arr_seq.pas b/TestSuite/foreach_arr_seq.pas
new file mode 100644
index 000000000..728217cc9
--- /dev/null
+++ b/TestSuite/foreach_arr_seq.pas
@@ -0,0 +1,8 @@
+begin
+  var a: array of sequence of byte;
+  SetLength(a,1);
+  a[0] := Seq(byte(1),byte(2));
+  
+  foreach var b in a do
+    Assert(b.GetType.Name='Byte[]');
+end.
\ No newline at end of file
diff --git a/bin/Lib/GraphWPF.pas b/bin/Lib/GraphWPF.pas
index 6936226ba..efd518ec2 100644
--- a/bin/Lib/GraphWPF.pas
+++ b/bin/Lib/GraphWPF.pas
@@ -459,6 +459,8 @@ var
   OnKeyDown: procedure(k: Key);
   /// Событие отжатия клавиши
   OnKeyUp: procedure(k: Key);
+  /// Событие нажатия символьной клавиши
+  OnKeyPress: procedure(ch: char);
   /// Событие изменения размера графического окна
   OnResize: procedure;
 
@@ -1391,16 +1393,20 @@ begin
 end;
 
 /// --- SystemKeyEvents
-procedure SystemOnKeyDown(sender: Object; e: KeyEventArgs);
-begin
+procedure SystemOnKeyDown(sender: Object; e: KeyEventArgs) := 
   if OnKeyDown<>nil then
     OnKeyDown(e.Key);
-end;
 
 procedure SystemOnKeyUp(sender: Object; e: KeyEventArgs) := 
   if OnKeyUp<>nil then
     OnKeyUp(e.Key);
     
+procedure SystemOnKeyPress(sender: Object; e: TextCompositionEventArgs) := 
+begin
+  if (OnKeyPress<>nil) and (e.Text<>nil) and (e.Text.Length>0) then
+    OnKeyPress(e.Text[1]);
+end;    
+    
 procedure SystemOnResize(sender: Object; e: SizeChangedEventArgs) := 
   if OnResize<>nil then
     OnResize();
@@ -1521,6 +1527,7 @@ public
     MouseMove += SystemOnMouseMove;
     KeyDown += SystemOnKeyDown;
     KeyUp += SystemOnKeyUp;
+    Self.TextInput += SystemOnKeyPress;
     SizeChanged += SystemOnResize;
     
     CompositionTarget.Rendering += RenderFrame;