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Asked: 2026-05-26T10:05:00+00:00

I am debugging an assembly which I loaded dynamically with Assembly.Load(Byte[]) , but I

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I am debugging an assembly which I loaded dynamically with Assembly.Load(Byte[]), but I am facing some problems.

First of all, I can’t move the yellow arrow in Visual Studio 2010 to step into other lines of code, and also I am getiing exceptions (“Cannot find the method on the object instance.”) when trying to do a quick watch on objects from a third party library (controls from Infragistics for example.)

Dim data = My.Computer.FileSystem.ReadAllBytes(file.FullName)
Assembly.Load(data)

When using Assembly.Load(String), everything works fine, and there are no problems.

Assembly.Load(IO.Path.GetFileNameWithoutExtension(file.Name))

Any idea why the behaviour is that much different? Anyway to fix this?

I tried loading the debugging symbols for my assembly with Assembly.Load(byte[]. byte[]), but I still get exceptions when trying to debug objects from third party libraries.

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1 Answer

  1. Editorial Team

    The debug symbols for your assembly are not being loaded into the application domain. When you use the string variety, .NET automatically looks for a .PDB alongside the filename you specify.

    To load an assembly and its symbols from byte arrays, use Assembly.Load(byte[], byte[]), like so:

    Dim data = My.Computer.FileSystem.ReadAllBytes(file.FullName)
Dim pdbData = My.Computer.FileSystem.ReadAllBytes(pdbFile.FullName)
Assembly.Load(data, pdbData)
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