diff --git a/SyntaxTree/tree/TreeHelper.cs b/SyntaxTree/tree/TreeHelper.cs
index c933f0edc..248583b1b 100644
--- a/SyntaxTree/tree/TreeHelper.cs
+++ b/SyntaxTree/tree/TreeHelper.cs
@@ -1401,5 +1401,10 @@ namespace PascalABCCompiler.SyntaxTree
     // end frninja
 
 
+    // SSM 02/06/16 - пробуем добавить кеш для семантического выражения
+    public partial class expression
+    {
+    }
+
 }
 
diff --git a/TreeConverter/TreeConversion/syntax_tree_visitor.cs b/TreeConverter/TreeConversion/syntax_tree_visitor.cs
index 2e1675e97..114c2b344 100644
--- a/TreeConverter/TreeConversion/syntax_tree_visitor.cs
+++ b/TreeConverter/TreeConversion/syntax_tree_visitor.cs
@@ -817,6 +817,7 @@ namespace PascalABCCompiler.TreeConverter
             expression_node en = ret.visit(expr);
 
             //en.loc=get_location(expr);
+
             return en;
         }
 
diff --git a/Yield/YieldConversionSyntax/YieldConversionSyntax.csproj b/Yield/YieldConversionSyntax/YieldConversionSyntax.csproj
index 911305df4..a03654cfb 100644
--- a/Yield/YieldConversionSyntax/YieldConversionSyntax.csproj
+++ b/Yield/YieldConversionSyntax/YieldConversionSyntax.csproj
@@ -17,7 +17,7 @@
     <DebugSymbols>true</DebugSymbols>
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
+    <OutputPath>..\..\bin\</OutputPath>
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
diff --git a/Yield/tests/yield1.pas b/Yield/tests/yield1.pas
index 18d0c9482..c29bcbe0f 100644
--- a/Yield/tests/yield1.pas
+++ b/Yield/tests/yield1.pas
@@ -5,7 +5,7 @@ begin
 end;
 
 begin
-  var q := Gen();
+  var q := Gen;
   foreach var x in q do
     Print(x);
 end.
\ No newline at end of file
diff --git a/bin/Lib/GraphABC.pas b/bin/Lib/GraphABC.pas
index fc19b5aa4..97bc0aadf 100644
--- a/bin/Lib/GraphABC.pas
+++ b/bin/Lib/GraphABC.pas
@@ -333,6 +333,12 @@ procedure DrawTextCentered(x,y,x1,y1: integer; s: string);
 procedure DrawTextCentered(x,y,x1,y1: integer; n: integer); 
 /// Выводит вещественное значение r, отцентрированное в прямоугольнике с координатами (x,y,x1,y1)
 procedure DrawTextCentered(x,y,x1,y1: integer; r: real); 
+/// Выводит строку s, отцентрированное по точке с координатами (x,y)
+procedure DrawTextCentered(x,y: integer; s: string); 
+/// Выводит целое n, отцентрированное по точке с координатами (x,y)
+procedure DrawTextCentered(x,y: integer; n: integer); 
+/// Выводит вещественное r, отцентрированное по точке с координатами (x,y)
+procedure DrawTextCentered(x,y: integer; r: real); 
 /// Заливает область одного цвета цветом c, начиная с точки (x,y).
 procedure FloodFill(x,y: integer; c: Color);
 
@@ -837,7 +843,7 @@ type
 
 /// Тип рисунка GraphABC
   Picture = class
-  private
+  public
     bmp,savedbmp: Bitmap;
     gb: Graphics;
     istransp: boolean;
@@ -2571,6 +2577,30 @@ begin
   DrawTextCentered(x,y,x1,y1,r.ToString(nfi));  
 end;
 
+procedure DrawTextCentered(x,y: integer; s: string); 
+begin
+  Monitor.Enter(f);
+  if NotLockDrawing then
+    DrawTextCentered(x,y,s,gr);
+  if DrawInBuffer then   
+    DrawTextCentered(x,y,s,gbmp);
+  Monitor.Exit(f);
+end;
+
+procedure DrawTextCentered(x,y: integer; n: integer); 
+begin
+  DrawTextCentered(x,y,n.ToString);  
+end;
+
+procedure DrawTextCentered(x,y: integer; r: real); 
+begin
+  var nfi := new System.Globalization.NumberFormatInfo();
+  nfi.NumberGroupSeparator := '.';
+
+  DrawTextCentered(x,y,r.ToString(nfi));  
+end;
+
+
 function Pnt(x,y: integer): Point;
 begin
   Result := new Point(x,y);
diff --git a/bin/Lib/GraphABCHelper.pas b/bin/Lib/GraphABCHelper.pas
index bef2c407e..271187116 100644
--- a/bin/Lib/GraphABCHelper.pas
+++ b/bin/Lib/GraphABCHelper.pas
@@ -1,4 +1,4 @@
-// Copyright (c) Ivan Bondarev, Stanislav Mihalkovich (for details please see \doc\copyright.txt)
+// Copyright (c) Ivan Bondarev, Stanislav Mihalkovich (for details please see \doc\copyright.txt)
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 unit GraphABCHelper;
 
@@ -47,6 +47,7 @@ procedure ClosedCurve(a: array of Point; gr: Graphics);
 
 procedure TextOut(x,y: integer; s: string; gr: Graphics); 
 procedure DrawTextCentered(x,y,x1,y1: integer; s: string; gr: Graphics); 
+procedure DrawTextCentered(x,y: integer; s: string; gr: Graphics); 
 
 function GetView(b: Bitmap; r: System.Drawing.Rectangle): Bitmap;
 function ImageIntersect(b1,b2: Bitmap): boolean;
@@ -386,6 +387,14 @@ begin
   gr.DrawString(s,Font.NETFont,_CurrentTextBrush,new System.Drawing.RectangleF(x,y,x1-x,y1-y),sf);
 end;
 
+procedure DrawTextCentered(x,y: integer; s: string; gr: Graphics); 
+begin
+  var sf := new StringFormat();
+  sf.Alignment := StringAlignment.Center;
+  sf.LineAlignment := StringAlignment.Center;
+   
+  gr.DrawString(s,Font.NETFont,_CurrentTextBrush,x,y,sf);
+end;
 
 var __initialized := false;
 
diff --git a/bin/Lib/PABCSystem.pas b/bin/Lib/PABCSystem.pas
index 738f8241f..f75377895 100644
--- a/bin/Lib/PABCSystem.pas
+++ b/bin/Lib/PABCSystem.pas
@@ -117,7 +117,7 @@ type
   /// Представляет базовый класс для реализации интерфейса IComparer
   Comparer<T> = System.Collections.Generic.Comparer<T>;
   
-  IComparable<T> = System.Collections.Generic.IComparable<T>;
+  IComparable<T> = System.IComparable<T>;
 
   /// Представляет множество значений, реализованное на базе хеш-таблицы
   HashSet<T> = System.Collections.Generic.HashSet<T>;