I created a setup project of window form application built in C# 4.0. I tested the setup in my test PC which have Vs 2010 Ultimate installed in it and its working fine in it.
I later on to test the application I installed it another machine which does not have VS in it. Every time I try to close the form, it ends up with this exception. The exception is occurring in some forms not in all. I have checked the code and and there is no difference in it(this.close()).
While building the setup I am using .Net Framework 4 Client Profile as Target Framework. Microsoft.VisualBasic.PowerPacks.Vs is added in setup. My not using tab strip nor trying to close multiple form.
This is the complete error Unhandled exception has occurred in your application. If you click continue, the application will ignore this error and attempt to continue. If you click quit, the application will close rimmediately.
See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at Microsoft.VisualBasic.PowerPacks.ShapeCollection.Dispose(Boolean disposing)
at Microsoft.VisualBasic.PowerPacks.ShapeContainer.Dispose(Boolean disposing)
at System.ComponentModel.Component.Dispose()
at System.Windows.Forms.Control.Dispose(Boolean disposing)
at System.ComponentModel.Component.Dispose()
at System.Windows.Forms.Control.Dispose(Boolean disposing)
at System.ComponentModel.Component.Dispose()
at System.Windows.Forms.Control.Dispose(Boolean disposing)
at System.Windows.Forms.Form.Dispose(Boolean disposing)
at ezyBizManager.Masters.frmUsers.Dispose(Boolean disposing)
at System.ComponentModel.Component.Dispose()
at System.Windows.Forms.Form.WmClose(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
ezyBizManager
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files/Microsoft/COE/ezyBizManager.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Data.Linq
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Data.Linq/v4.0_4.0.0.0__b77a5c561934e089/System.Data.Linq.dll
----------------------------------------
System.Core
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Configuration
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Data
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Data/v4.0_4.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
System.Transactions
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Transactions/v4.0_4.0.0.0__b77a5c561934e089/System.Transactions.dll
----------------------------------------
System.EnterpriseServices
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.EnterpriseServices/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll
----------------------------------------
System.Xml.Linq
Assembly Version: 4.0.0.0
Win32 Version: 4.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml.Linq/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.Linq.dll
----------------------------------------
Anonymously Hosted DynamicMethods Assembly
Assembly Version: 0.0.0.0
Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/mscorlib/v4.0_4.0.0.0__b77a5c561934e089/mscorlib.dll
----------------------------------------
Microsoft.VisualBasic.PowerPacks.Vs
Assembly Version: 10.0.0.0
Win32 Version: 10.0.20911.1
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Microsoft.VisualBasic.PowerPacks.Vs/10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.PowerPacks.Vs.dll
----------------------------------------
Microsoft.VisualBasic
Assembly Version: 10.0.0.0
Win32 Version: 10.0.30319.1 built by: RTMRel
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualBasic/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled.
For example:
<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.
[Edited:] I am using image to close the form.
private void imgClose_Click(object sender, EventArgs e)
{
this.Close();
}
I think it's a bug in the Dispose() method of ShapeCollection. If I look at this method using for example .NET Reflector, with Microsoft.VisualBasic.PowerPacks.Vs, Version=9.0.0.0, it says this:
foreach (Shape shape in this.m_Shapes)
{
shape.Dispose();
}
And if I look at this method using Microsoft.VisualBasic.PowerPacks.Vs, Version=10.0.0.0, it says this:
for (int i = this.m_Shapes.Count - 1; i >= 0; i--)
{
this.m_Shapes[i].Dispose();
}
Clearly, the implementation has evolved between versions. The latter one doesn't rely on an Enumerator object and therefore cannot fail with the error you show.
What's strange though is your stackframe seems to imply you're running off version 10, which shouldn't use the enumerator?? Maybe you need a VS 2010 update? Or you can also check at the Dispose implementation on the Microsoft.VisualBasic.PowerPacks.Vs you're using.
EDIT: after some digging, your application indeed runs on an old version of the VB Powerpacks. Upgrade to VS2010, SP1 or copy the DLL from a good installation. For this specific Dispose bug, you need at least 10.0.30319.1.
I had the same pblm with, especially with LineShape, after headache with installing and searching for right PowerPacks package, I replaced it with RichTextBox by adjusting backcolor to balck and the size, it seems weird but it's quite better for me than spending my time with this bug !! (0_o)
I had the same problem. I've been so confused as to what was causing the issue and have been stepping through debugging line by line for a day or so. After Google searching and typing in the right description, it turns out the issue is with line shapes on a form - and likely other shapes. See the links here, hope it saves somebody else some time... you have to read down through the comments, by like the above post it's with line shapes.
http://channel9.msdn.com/forums/TechOff/520076-VB-2010-Error-PowerPacks-Line-Shape-Dispose/
来源：https://stackoverflow.com/questions/14788919/exception-collection-was-modified-enumeration-operation-may-not-execute-on-fo