Available and Unavailable .NET Assemblies from Sandboxed Solutions in SharePoint 2010
Published: February 2011
Available in SharePoint Online
This topic lists the Microsoft .NET Framework 3.5 assemblies that are available from SharePoint sandboxed solutions and those that are unavailable.
Sandboxed solutions run in a special sandboxed worker process (SPUCWorkerProcess.exe) that is governed by a highly restrictive code access security (CAS) policy. In addition to the specifics of this policy, the very fact that there is such a policy, and that it does not grant full permissions, makes the code that runs in the sandbox a partially trusted caller. This means that such code can access only those .NET Framework 3.5 assemblies that have the AllowPartiallyTrustedCallersAttribute attribute. The following sections list the .NET Framework 3.5 assemblies that do and do not have this attribute.
Security Note
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Remember that having the attribute is a necessary, but not a sufficient, condition for calling the assembly's classes from sandboxed code. Such an assembly may have classes or members that require a permission that is not allowed by the CAS policy of the sandboxed worker process. |
.NET Framework 3.5 Assemblies That Have the AllowPartiallyTrustedCallers Attribute
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Assembly |
Remarks |
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Accessibility |
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IEExecRemote |
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Microsoft.VisualBasic |
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Microsoft.Vsa |
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mscorlib |
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PresentationCore |
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PresentationFramework and all PresentationFramework.* |
Windows Presentation Foundation |
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Sentinel.v3.5Client |
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System |
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All System.* except the 19 System.* assemblies listed in the next table. Most of the exceptions have "Design," "Runtime," or "Workflow" in the assembly name. |
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System.Windows.Forms |
Windows Forms |
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UIAutomationProvider |
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UIAutomationTypes |
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WindowsBase |
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.NET Framework 3.5 Assemblies That Do Not Have the AllowPartiallyTrustedCallers Attribute
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csccompmgd |
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CustomMarshallers |
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IEHost |
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IIEHost |
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ISymWrapper |
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All Microsoft.Build.* |
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Microsoft.Data.Entity.Build.Tasks |
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Microsoft.VisualBasic.Compatibility |
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Microsoft.VisualBasic.Compatibility.Data |
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Microsoft.VisualBasic.Vsa |
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Microsoft.VisualC |
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Microsoft.VisualC.STLCLR |
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Microsoft.Vsa.Vb.CodeDOMProcessor |
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Microsoft_VsaVB |
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PresentationBuildTasks |
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ReachFramework |
Printing and XPS |
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sysglobl |
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System.Configuration.Install |
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System.Data.Services.Design |
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System.Design |
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System.Drawing.Design |
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System.IdentityModel.Selectors |
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System.IO.Log |
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System.Management |
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System.ManagementInstrumentation |
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System.Messaging |
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System.Runtime.Remoting |
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System.Runtime.Serialization.Formatters.Soap |
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System.Speech |
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System.Web.DynamicData.Design |
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System.Web.Entity.Design |
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System.Web.Extensions.Design |
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System.Workflow.Activities |
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System.Workflow.ComponentModel |
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System.Workflow.Runtime |
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System.WorkflowServices |
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UIAutomationClient |
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UIAutomationClientsideProviders |
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WindowsFormsIntegration |
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