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Update Ildasm.exe documentation with safety warning #55974

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jkoritzinsky merged 2 commits into from
Sep 15, 2026
Merged

Update Ildasm.exe documentation with safety warning #55974

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Update Ildasm.exe documentation with safety warning
jkoritzinsky Sep 15, 2026
6d16da0
Update warning for Ildasm.exe usage
jkoritzinsky Sep 15, 2026
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3 changes: 3 additions & 0 deletions docs/framework/tools/ildasm-exe-il-disassembler.md
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Expand Up @@ -102,6 +102,9 @@ If you provide *Ildasm.exe* with a *PEfilename* argument that contains embedded

You can run *Ildasm.exe* over an.exe or *.dll* file to determine whether the file is managed. If the file is not managed, the tool displays a message stating that the file has no valid common language runtime header and cannot be disassembled. If the file is managed, the tool runs successfully.

> [!WARNING]
> *Ildasm.exe* should only be used with trusted input. Do not pass untrusted files to *Ildasm.exe*.

## Version Information

Starting with .NET Framework 4.5, *Ildasm.exe* handles an unrecognized marshal BLOB (binary large object) by displaying the raw binary content. For example, the following code shows how a marshal BLOB generated by a C# program is displayed:
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