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Hi All,
I have just had a problem with some VB.net, I wonder if anybody can shed a little light and ease my confused brain. The problem is resolved now but I can't work out what happened and, more importantly, I can't guarantee it won't happen again. Have I misunderstood the situation? Can anybody help?

An error was spotted in a running application (A new build had just been deployed). When we stepped through the source the debugger would step completely over a line of code without executing it. When I ran ILDASM on the dll with show source lines the source line that was being missed out would be shown but no compiled code seemed to have been inserted into the dll. Below is a transcript of the ildasm output. The line 164 (in the VB source) where a call to Me.SelectAddParms seems to generate no il code at all. The il code for all the following vb source lines seems also to have been moved up to the line above.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_000e: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0013: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0018: ldc.i4.0
IL_0019: ble.s IL_0040
//000165: If Me.Select.Rows.Count > 0 Then
IL_001b: ldarg.0
IL_001c: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0021: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0026: ldc.i4.0
IL_0027: callvirt instance class [System.Data]System.Data.DataRow [System.Data]System.Data.DataRowCollection::get_Item(int32)
IL_002c: ldstr "ContactID"
IL_0031: callvirt instance object [System.Data]System.Data.DataRow::get_Item(string)
IL_0036: call int32 [Microsoft.VisualBasic]Microsoft.VisualBasic.CompilerServices.IntegerType ::FromObject(object)
IL_003b: stloc.0
IL_003c: br.s IL_0046
IL_003e: br.s IL_0045

Rebuilding this dll individually seemed to have no effect but the problem was resolved by building all of the dlls in the project, some of which this code uses. A transcript of the ILDASM output for the same section after the resolution is below. Four additional lines of il were produced. These lines are the call to the required method. No changes to the source code were made.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: ldc.i4.s 16
IL_000b: ldarg.1
IL_000c: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::SelectAddParm s(int32,
object)
IL_0011: nop
//000165: If Me.Select.Rows.Count > 0 Then
IL_0012: ldarg.0
IL_0013: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0018: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_001d: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0022: ldc.i4.0
IL_0023: ble.s IL_004a

Many Thanks
Joe Simmonds
Nov 20 '05 #1
5 1132
What happens if you create a completely fresh project and put just enough code to run that particular line ?

OHM
"Joe Simmonds" <jo*@bhth.com> wrote in message news:uN**************@TK2MSFTNGP10.phx.gbl...
Hi All,
I have just had a problem with some VB.net, I wonder if anybody can shed a little light and ease my confused brain. The problem is resolved now but I can't work out what happened and, more importantly, I can't guarantee it won't happen again. Have I misunderstood the situation? Can anybody help?

An error was spotted in a running application (A new build had just been deployed). When we stepped through the source the debugger would step completely over a line of code without executing it. When I ran ILDASM on the dll with show source lines the source line that was being missed out would be shown but no compiled code seemed to have been inserted into the dll. Below is a transcript of the ildasm output. The line 164 (in the VB source) where a call to Me.SelectAddParms seems to generate no il code at all. The il code for all the following vb source lines seems also to have been moved up to the line above.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_000e: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0013: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0018: ldc.i4.0
IL_0019: ble.s IL_0040
//000165: If Me.Select.Rows.Count > 0 Then
IL_001b: ldarg.0
IL_001c: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0021: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0026: ldc.i4.0
IL_0027: callvirt instance class [System.Data]System.Data.DataRow [System.Data]System.Data.DataRowCollection::get_Item(int32)
IL_002c: ldstr "ContactID"
IL_0031: callvirt instance object [System.Data]System.Data.DataRow::get_Item(string)
IL_0036: call int32 [Microsoft.VisualBasic]Microsoft.VisualBasic.CompilerServices.IntegerType ::FromObject(object)
IL_003b: stloc.0
IL_003c: br.s IL_0046
IL_003e: br.s IL_0045

Rebuilding this dll individually seemed to have no effect but the problem was resolved by building all of the dlls in the project, some of which this code uses. A transcript of the ILDASM output for the same section after the resolution is below. Four additional lines of il were produced. These lines are the call to the required method. No changes to the source code were made.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: ldc.i4.s 16
IL_000b: ldarg.1
IL_000c: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::SelectAddParm s(int32,
object)
IL_0011: nop
//000165: If Me.Select.Rows.Count > 0 Then
IL_0012: ldarg.0
IL_0013: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0018: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_001d: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0022: ldc.i4.0
IL_0023: ble.s IL_004a

Many Thanks
Joe Simmonds
Nov 20 '05 #2
Thanks for the response,
I have created a minimal implementation and the compiles fine and produces the expected il. I would like to add that the original project also produces the expected il when built. It was just that one build that caused a problem. I have not yet been able to reproduce it at all since the entire solution was rebuilt. We have a working build and the problem does not seem to reoccur I just want to know what happened for my own peace of mind.

Thanks

Joe
"One Handed Man ( OHM#)" <news.microsoft.com> wrote in message news:ut**************@TK2MSFTNGP10.phx.gbl...
What happens if you create a completely fresh project and put just enough code to run that particular line ?

OHM
"Joe Simmonds" <jo*@bhth.com> wrote in message news:uN**************@TK2MSFTNGP10.phx.gbl...
Hi All,
I have just had a problem with some VB.net, I wonder if anybody can shed a little light and ease my confused brain. The problem is resolved now but I can't work out what happened and, more importantly, I can't guarantee it won't happen again. Have I misunderstood the situation? Can anybody help?

An error was spotted in a running application (A new build had just been deployed). When we stepped through the source the debugger would step completely over a line of code without executing it. When I ran ILDASM on the dll with show source lines the source line that was being missed out would be shown but no compiled code seemed to have been inserted into the dll. Below is a transcript of the ildasm output. The line 164 (in the VB source) where a call to Me.SelectAddParms seems to generate no il code at all. The il code for all the following vb source lines seems also to have been moved up to the line above.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_000e: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0013: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0018: ldc.i4.0
IL_0019: ble.s IL_0040
//000165: If Me.Select.Rows.Count > 0 Then
IL_001b: ldarg.0
IL_001c: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0021: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0026: ldc.i4.0
IL_0027: callvirt instance class [System.Data]System.Data.DataRow [System.Data]System.Data.DataRowCollection::get_Item(int32)
IL_002c: ldstr "ContactID"
IL_0031: callvirt instance object [System.Data]System.Data.DataRow::get_Item(string)
IL_0036: call int32 [Microsoft.VisualBasic]Microsoft.VisualBasic.CompilerServices.IntegerType ::FromObject(object)
IL_003b: stloc.0
IL_003c: br.s IL_0046
IL_003e: br.s IL_0045

Rebuilding this dll individually seemed to have no effect but the problem was resolved by building all of the dlls in the project, some of which this code uses. A transcript of the ILDASM output for the same section after the resolution is below. Four additional lines of il were produced. These lines are the call to the required method. No changes to the source code were made.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: ldc.i4.s 16
IL_000b: ldarg.1
IL_000c: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::SelectAddParm s(int32,
object)
IL_0011: nop
//000165: If Me.Select.Rows.Count > 0 Then
IL_0012: ldarg.0
IL_0013: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0018: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_001d: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0022: ldc.i4.0
IL_0023: ble.s IL_004a

Many Thanks
Joe Simmonds
Nov 20 '05 #3
I think in all probability, this is a bug which may occur occasionally. When I experience these problems I rarely put effort into it unless I can either repeat it or it is absolutely vital that this must never happen again, such as writing robust code for medical applications where no scope for error must be allowed.

Do what they do in China, put it in the pigeon hole unless it happens again. It was probably something to do with Venus crossing the sun.

Regards - OHM

"Joe Simmonds" <jo*@bhth.com> wrote in message news:ey**************@TK2MSFTNGP10.phx.gbl...
Thanks for the response,
I have created a minimal implementation and the compiles fine and produces the expected il. I would like to add that the original project also produces the expected il when built. It was just that one build that caused a problem. I have not yet been able to reproduce it at all since the entire solution was rebuilt. We have a working build and the problem does not seem to reoccur I just want to know what happened for my own peace of mind.

Thanks

Joe
"One Handed Man ( OHM#)" <news.microsoft.com> wrote in message news:ut**************@TK2MSFTNGP10.phx.gbl...
What happens if you create a completely fresh project and put just enough code to run that particular line ?

OHM
"Joe Simmonds" <jo*@bhth.com> wrote in message news:uN**************@TK2MSFTNGP10.phx.gbl...
Hi All,
I have just had a problem with some VB.net, I wonder if anybody can shed a little light and ease my confused brain. The problem is resolved now but I can't work out what happened and, more importantly, I can't guarantee it won't happen again. Have I misunderstood the situation? Can anybody help?

An error was spotted in a running application (A new build had just been deployed). When we stepped through the source the debugger would step completely over a line of code without executing it. When I ran ILDASM on the dll with show source lines the source line that was being missed out would be shown but no compiled code seemed to have been inserted into the dll. Below is a transcript of the ildasm output. The line 164 (in the VB source) where a call to Me.SelectAddParms seems to generate no il code at all. The il code for all the following vb source lines seems also to have been moved up to the line above.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_000e: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0013: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0018: ldc.i4.0
IL_0019: ble.s IL_0040
//000165: If Me.Select.Rows.Count > 0 Then
IL_001b: ldarg.0
IL_001c: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0021: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0026: ldc.i4.0
IL_0027: callvirt instance class [System.Data]System.Data.DataRow [System.Data]System.Data.DataRowCollection::get_Item(int32)
IL_002c: ldstr "ContactID"
IL_0031: callvirt instance object [System.Data]System.Data.DataRow::get_Item(string)
IL_0036: call int32 [Microsoft.VisualBasic]Microsoft.VisualBasic.CompilerServices.IntegerType ::FromObject(object)
IL_003b: stloc.0
IL_003c: br.s IL_0046
IL_003e: br.s IL_0045

Rebuilding this dll individually seemed to have no effect but the problem was resolved by building all of the dlls in the project, some of which this code uses. A transcript of the ILDASM output for the same section after the resolution is below. Four additional lines of il were produced. These lines are the call to the required method. No changes to the source code were made.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: ldc.i4.s 16
IL_000b: ldarg.1
IL_000c: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::SelectAddParm s(int32,
object)
IL_0011: nop
//000165: If Me.Select.Rows.Count > 0 Then
IL_0012: ldarg.0
IL_0013: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0018: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_001d: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0022: ldc.i4.0
IL_0023: ble.s IL_004a

Many Thanks
Joe Simmonds
Nov 20 '05 #4
I think that's probably good advice. I'll let it go unless it happens again later.

thanks for your help

Joe
"One Handed Man ( OHM#)" <news.microsoft.com> wrote in message news:%2****************@tk2msftngp13.phx.gbl...
I think in all probability, this is a bug which may occur occasionally. When I experience these problems I rarely put effort into it unless I can either repeat it or it is absolutely vital that this must never happen again, such as writing robust code for medical applications where no scope for error must be allowed.

Do what they do in China, put it in the pigeon hole unless it happens again. It was probably something to do with Venus crossing the sun.

Regards - OHM

"Joe Simmonds" <jo*@bhth.com> wrote in message news:ey**************@TK2MSFTNGP10.phx.gbl...
Thanks for the response,
I have created a minimal implementation and the compiles fine and produces the expected il. I would like to add that the original project also produces the expected il when built. It was just that one build that caused a problem. I have not yet been able to reproduce it at all since the entire solution was rebuilt. We have a working build and the problem does not seem to reoccur I just want to know what happened for my own peace of mind.

Thanks

Joe
"One Handed Man ( OHM#)" <news.microsoft.com> wrote in message news:ut**************@TK2MSFTNGP10.phx.gbl...
What happens if you create a completely fresh project and put just enough code to run that particular line ?

OHM
"Joe Simmonds" <jo*@bhth.com> wrote in message news:uN**************@TK2MSFTNGP10.phx.gbl...
Hi All,
I have just had a problem with some VB.net, I wonder if anybody can shed a little light and ease my confused brain. The problem is resolved now but I can't work out what happened and, more importantly, I can't guarantee it won't happen again. Have I misunderstood the situation? Can anybody help?

An error was spotted in a running application (A new build had just been deployed). When we stepped through the source the debugger would step completely over a line of code without executing it. When I ran ILDASM on the dll with show source lines the source line that was being missed out would be shown but no compiled code seemed to have been inserted into the dll. Below is a transcript of the ildasm output. The line 164 (in the VB source) where a call to Me.SelectAddParms seems to generate no il code at all. The il code for all the following vb source lines seems also to have been moved up to the line above.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_000e: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0013: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0018: ldc.i4.0
IL_0019: ble.s IL_0040
//000165: If Me.Select.Rows.Count > 0 Then
IL_001b: ldarg.0
IL_001c: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0021: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_0026: ldc.i4.0
IL_0027: callvirt instance class [System.Data]System.Data.DataRow [System.Data]System.Data.DataRowCollection::get_Item(int32)
IL_002c: ldstr "ContactID"
IL_0031: callvirt instance object [System.Data]System.Data.DataRow::get_Item(string)
IL_0036: call int32 [Microsoft.VisualBasic]Microsoft.VisualBasic.CompilerServices.IntegerType ::FromObject(object)
IL_003b: stloc.0
IL_003c: br.s IL_0046
IL_003e: br.s IL_0045

Rebuilding this dll individually seemed to have no effect but the problem was resolved by building all of the dlls in the project, some of which this code uses. A transcript of the ILDASM output for the same section after the resolution is below. Four additional lines of il were produced. These lines are the call to the required method. No changes to the source code were made.

//000162: Me.ClearSelectParms()
IL_0001: ldarg.0
IL_0002: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::ClearSelectPa rms()
IL_0007: nop
//000163:
//000164: Me.SelectAddParms(FieldList.clsContactFieldList.NT Logon, sNTLogon)
IL_0008: ldarg.0
IL_0009: ldc.i4.s 16
IL_000b: ldarg.1
IL_000c: callvirt instance void [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::SelectAddParm s(int32,
object)
IL_0011: nop
//000165: If Me.Select.Rows.Count > 0 Then
IL_0012: ldarg.0
IL_0013: callvirt instance class [System.Data]System.Data.DataTable [AIM2DataClasses]PI_BaseClasses.clsPIDBBaseExtension::Select()
IL_0018: callvirt instance class [System.Data]System.Data.DataRowCollection [System.Data]System.Data.DataTable::get_Rows()
IL_001d: callvirt instance int32 [System.Data]System.Data.InternalDataCollectionBase::get_Count( )
IL_0022: ldc.i4.0
IL_0023: ble.s IL_004a

Many Thanks
Joe Simmonds
Nov 20 '05 #5
* "Joe Simmonds" <jo*@bhth.com> scripsit:
I have just had a problem with some VB.net, I wonder if anybody can shed a little light and ease my confused brain.* The
problem is resolved now but I can't work out what happened and, more importantly, I can't guarantee it won't happen again.*
Have*I misunderstood the situation?


Maybe there was a problem with the files in the "obj" folder, and
rebuilding the whole solution overwrote these files. Who knows...

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>
Nov 20 '05 #6

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by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...
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by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The...
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by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...

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