System.InvalidOperationException: Unable to generate a temporary class (result=1)

Question

I have developed an application using .net 3.5 and have deployed it as an .exe on a number of machines with the same environment. However, on one particular machine I get th

Answer 1

You Need to give the permission to the temp folder which is in windows folder. And Your Problem is Solved...........

Answer 2

You need to add *IIS_IUSR* user with read write permission to C:\Windows\Temp folder.

NOTE: Everyone user will not work with full control.

Answer 3

XML Serialisation works by generating code to perform the serialisation. This is done in a temporary assembly created for that purpose the first time it is needed.

However this relies on being able to write the assembly to disk.¹

Your options are either to (1) given the user account which is running the process write permission (for an ASP.NET application this is likely to be a bad idea). (2) Use the SDK tool (sgen.exe) to pre-generate (at development/compile time) the serialisation assembly, and then use (and deplot) that assembly.

¹Open question: the APIs exist to create assemblies dynamically in memory: why not do that?

Answer 4

the APIs exist to create assemblies dynamically in memory: why not do that?

Just a wild guess: I assume this possibility did not exist yet in .NET 1.0, or at least when the XmlSerializer was created and MS doesn't like changing existing behavior...

Answer 5

I just spent a lot of time searching for the answer to this so I thought I'd add it here to save some headache for others. If you use the xsd.exe tool to generate your cs it may have added double arrays [][] where an array should be []. Replace all [][] with [] in your generated cs file and retry.

Answer 6

Give Read/Write Privileges to 'C:\WINDOWS\TEMP' folder. It will work.