Unload Dynamic Assembly

Question

Hi I use  System.AppDomain.DefineDynamicAssembly generated a dynamic assemly. How can I unload the assembly?

Let me clarify this little bit more. I know that assemblies can not be unloaded except it's being loaded in a separate appdomain. According to this aritcle http://msdn.microsoft.com/en-us/library/dd554932.aspx (Collectible Assemblies for Dynamic Type Generation)

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To enable unloading, use the AssemblyBuilderAccess.RunAndCollect flag when you create a dynamic assembly. The assembly is transient (that is, it cannot be saved) and is subject to limitations described in the Restrictions on Collectible Assemblies section. The common language runtime (CLR) unloads a collectible assembly automatically when you have released all objects associated with the assembly. In all other respects, collectible assemblies are created and used in the same way as other dynamic assemblies.

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I wonder if there is any way that you could explicitly unload the assembly

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Regards

John Huang, MVP-SQL, MCM-SQL, http://www.sqlnotes.info

Answer 1

Hi, 

We cannot unload loaded assembly alone the only way is unload AppDomain.

(http://msdn.microsoft.com/en-us/library/ms173101(v=VS.80).aspx)

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Answer 2

Let me clarify this little bit more. I know that assemblies can not be unloaded except it's being loaded in a separate appdomain. According to this aritcle http://msdn.microsoft.com/en-us/library/dd554932.aspx (Collectible Assemblies for Dynamic Type Generation)

"

To enable unloading, use the AssemblyBuilderAccess.RunAndCollect flag when you create a dynamic assembly. The assembly is transient (that is, it cannot be saved) and is subject to limitations described in the Restrictions on Collectible Assemblies section. The common language runtime (CLR) unloads a collectible assembly automatically when you have released all objects associated with the assembly. In all other respects, collectible assemblies are created and used in the same way as other dynamic assemblies.

"

I wonder if there is any way that you could explicitly unload the assembly

---

Regards

John Huang, MVP-SQL, MCM-SQL, http://www.sqlnotes.info

Answer 3

Thanks for your response, i just clarified my questions there.

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Regards

John Huang, MVP-SQL, MCM-SQL, http://www.sqlnotes.info

Answer 4

Let me clarify this little bit more. I know that assemblies can not be unloaded except it's being loaded in a separate appdomain. According to this aritcle http://msdn.microsoft.com/en-us/library/dd554932.aspx (Collectible Assemblies for Dynamic Type Generation)

"

To enable unloading, use the AssemblyBuilderAccess.RunAndCollect flag when you create a dynamic assembly. The assembly is transient (that is, it cannot be saved) and is subject to limitations described in the Restrictions on Collectible Assemblies section. The common language runtime (CLR) unloads a collectible assembly automatically when you have released all objects associated with the assembly. In all other respects, collectible assemblies are created and used in the same way as other dynamic assemblies.

"

I wonder if there is any way that you could explicitly unload the assembly

---

Regards

John Huang, MVP-SQL, MCM-SQL, http://www.sqlnotes.info

Hello,

Term "unloads a collectible assembly automatically" the assembly will unloaded "asynchronously" so if you "explicitly" relase reference of types of assembly it will be  unloaded.  By mean of "need explicity unload",  Do u want to wait this happens and block your code or  you  need critical time that the assembly must be  unloaded ASAP? 

Regards.