T4 Template debugger shows incorrect lines while multiple TT files included

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C#

ASP.NET

Visual-Studio

C#4.0

, +

I am trying to debug the following T4 template file using VS2010 professional , windows 7.

But debugger doesn't highlight the Correct line in the File : "Texttemplate2.tt"

File 1: File1.tt

<#@ template debug="true" hostspecific="true" language="C#" #>

<#@ include file="Texttemplate2.tt"  #>

<#

System.Diagnostics.Debugger.Launch();



    int a= 10;

    Write("ASS");

    GetProperty("User","UserName");

#>

File : Texttemplate2.tt

<#@ template debug="true" hostspecific="true" language="C#" #>
<#@ assembly name="System.Xml" #>
<#@ import namespace="System.Xml" #>
<#@ import namespace="System.IO" #>
<#+

 public void Load()
    {
        string doc=null;
        if(doc == null)
        {
            string templateDirectory = Path.GetDirectoryName(Host.TemplateFile);
            string absolutePath = Path.Combine(templateDirectory,"../../App_Data/EntityUI_MetaData_Appsettings.xml");
        }
    }
 public string GetProperty(string Entity, string prop)
    {
         Load();
         string node="none";

         if (node != "0" )
         {
            if (node == Entity )
              {
                return node;
              }
         }
        return null;
    }
 #>

Is anything wrong with my code or VS2010 debugger.

Revised :

I have read all the related links regarding T4 template.but my problem is different. Let me explain the question in detail.I have created the above two T4 template files. Now I want to debug my T4 template file "File1.tt" Code ( not the generated code). what I did I launched debugger with

System.Diagnostics.Debugger.Launch();

and set breakpoints in the at

int a= 10;

.pressing F5 now caused my breakpoint is to be hit.

int a= 10;

is now highlighted with YELLOW COLOR as BACKGOUND and YELLOW ARROW as in LEFT . press F11 thereafter until you reach

GetProperty

, there you will notice that YELLOW ARROW , means current executing statement is not highlighted.

Meant, supppose Line:20 is the next executing statement , the debugger highlights line:10 in texttemplatefile2.tt