That assembly does not allow partially trusted callers.

Why am I getting this I am trying to debug a C# application on my own machine, so, as I understand it, my program should have full trust.

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That assembly does not allow partially trusted callers.

Chattabaugh
Does your assembly contain any assembly-level permission attributes
pgupta
I'm using a thrid-party DLL. I don't have access to the source code. How can I change the attributes to get rid of this annoying "security" exception.
ngapulay
Have you set your application properties to debug with partial trust If you're not sure what this means, take a look at the Security tab of your project's properties window. Are ClickOnce security settings enabled If so, is your application set to run with full trust or partial trust If the latter, do the advanced settings indicate that the application should be debugged with the specified permission set
MEK_GDM
System.Security.SecurityException was unhandled
Message="That assembly does not allow partially trusted callers."
Source="MS.SD.Admin.Status"
GrantedSet=""
PermissionState=""
RefusedSet=""
Url="file:///C:/projects/toolbox/SDAdmExp/Whidbey/SDAdmExp/bin/Debug/MS.SD.Admin.Status.DLL"
StackTrace:
at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Assembly asm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh, SecurityAction action, Object demand, IPermission permThatFailed)
at MS.SD.Admin.Status.Sample..ctor(String port, EventLog eventlog, String sqlConnectionString)
at MS.SD.Admin.Status.Sample..ctor(String port, EventLog eventlog) in C:\projects\toolbox\SDAdmExp\Whidbey\MS.SD.Admin.Status\Sample.cs:line 26
at MS.SD.Admin.Explorer.Form1.Menu_View_Refresh_Click(Object sender, EventArgs e) in C:\projects\toolbox\SDAdmExp\Whidbey\SDAdmExp\Form1.cs:line 1488
at MS.SD.Admin.Explorer.Form1.Menu_File_Connect_Click(Object sender, EventArgs e) in C:\projects\toolbox\SDAdmExp\Whidbey\SDAdmExp\Form1.cs:line 2326
at System.Windows.Forms.MenuItem.OnClick(EventArgs e)
at System.Windows.Forms.MenuItem.ShortcutClick()
at System.Windows.Forms.Menu.ProcessCmdKey(Message& msg, Keys keyData)
at System.Windows.Forms.Form.ProcessCmdKey(Message& msg, Keys keyData)
at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
at System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
at System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at MS.SD.Admin.Explorer.Form1.Main() in C:\projects\toolbox\SDAdmExp\Whidbey\SDAdmExp\Form1.cs:line 1313
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
camilero999
Does your MS.SD.Admin.Status.DLL try to call into any other assemblies
spkeller
In my Application ,When I am hosted my application , that gives an error....

"
Exception: System.Security.SecurityException:That

assembly does not allow partially trusted callers.

Description: Application attemped to perform an

operation not allowed by the security policy.

To grant this application the required permission,

please contact your system administrator or change the

application trust level in the configuration file "

I called the Hosting Company and they confirm that

the application runs on a Full Trust but their system

supports application with Medium Trust.

Ok , So I make my changes in Web.Config as

<trust level="Medium" originUrl=""/>

I am also making a reference to an assembly from where this error is coming and added one line in it's assembly info class as

<Assembly: AllowPartiallyTrustedCallers()>

But still the error is same .

To test the application I set

<trust level="Medium" originUrl=""/> in my machine level config file.

What else should I do.

This is very urgent.
Any kind of help is appreciated.

Two more thing to add..

First ,I am using asp.net 2.0 and secondly, my assembly is referencing another assembly ( named: MySql.Data.dll ) which is a third party assembly.

Second , What is the link of strong name with this error.
Should my assembly be strong named.
Vitaly Pimenov

[assembly: ComVisible(false)]
[assembly: CLSCompliant(true)]

[assembly: FileIOPermission(SecurityAction.RequestOptional, Unrestricted = true)]
[assembly: ReflectionPermissionAttribute(SecurityAction.RequestMinimum, Unrestricted = true)]
[assembly: SecurityPermission(SecurityAction.RequestMinimum, Unrestricted = true)]
[assembly: EventLogPermission(SecurityAction.RequestMinimum, Unrestricted = true)]
[assembly: UIPermissionAttribute(SecurityAction.RequestMinimum, Unrestricted = true)]

MS.SD.ADmin.Status.dll references System, System.Data, System.Web, System.XML, and an interop assembly that VS created for a COM dll.

The same project builds and runs fine on a different [x86] machine.
RMcGill
Any RequestOptional acts as an implicit rejection of any permission for which a RequestMinimum or RequestOptional is not present. Therefore, due to your RequestOptional for unrestricted FileIOPermission, your assembly ends up being partially trusted. If you want to enable your assembly to be fully trusted, you'll need to either remove that attribute, change it to a RequestMinimum, or add a RequestOptional for an unrestricted permission grant (aka "full trust"). e.g.:

[assembly: PermissionSet(SecurityAction.RequestOptional, Unrestricted = true)]
goozbee
Are you sure that the problem is caused by assembly-level permission attributes in the third party DLL There are many other reasons that security exceptions can be thrown. If you need help identifying the problem, please post the full exception details (including call stack listing), as returned from the exception's ToString method.
Rambo
Thanks, changing to RequestMinimum worked.
precchia
Might you be willing to provide the full exception details (including call stack listing) as returned by the exception's ToString method
Vijay Shah
It is marked as a full trust application. I selected partial trust and clicked Advanced, unchecked "Debug this application with the selected permission set", switched it back to full trust and retried, with the same results.
That assembly does not allow partially trusted callers.

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