Adam Furmanek
Hacking C# from the inside - how to do anything in NET
#1about 6 minutes
Avoiding dynamic dispatch with static method invocation
Bypass polymorphism by generating intermediate language (IL) with the `call` instruction instead of `callvirt` to invoke a specific base class method.
#2about 4 minutes
How to await async void methods in C#
Implement a custom `TaskScheduler` and `SynchronizationContext` to enable awaiting `async void` methods and properly handle their exceptions.
#3about 14 minutes
Running raw machine code from a C# byte array
Explore two methods for executing machine code: using the `Marshall` API for managed delegates or by manually overwriting a method's body with a CPU jump instruction.
#4about 4 minutes
Hijacking methods by modifying metadata or machine code
Explore two techniques for method hijacking: either by overwriting the function pointer in the method descriptor or by injecting a jump instruction into the method's machine code.
#5about 6 minutes
Use case: Running an application on a different desktop
Apply method hijacking to the `CreateProcess` API by intercepting a constructor to specify a target desktop, a feature not exposed by the standard .NET API.
#6about 2 minutes
Use case: Handling unhandled exceptions on a thread
Prevent application crashes by hijacking the `Thread` constructor to automatically wrap the thread's starting logic in a try-catch block.
#7about 4 minutes
Handling the uncatchable StackOverflowException
Catch a `StackOverflowException` by using a WinAPI vectored exception handler to save and restore CPU registers, allowing the application to continue safely.
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