In C# when debugging threads for example, you can see each thread's ID.
I couldn't find a way to get that same thread, programmatically. I could not even get the ID of the current thread (in the properties of the Thread.currentThread).
So, I wonder how does Visual Studio get the IDs of the threads, and is there a way to get the handle of the thread with id 2345, for example?
The offset under Windows 10 is 0x022C (x64-bit-Application) and 0x0160 (x32-bit-Application):
public static int GetNativeThreadId(Thread thread)
{
var f = typeof(Thread).GetField("DONT_USE_InternalThread",
BindingFlags.GetField | BindingFlags.NonPublic | BindingFlags.Instance);
var pInternalThread = (IntPtr)f.GetValue(thread);
var nativeId = Marshal.ReadInt32(pInternalThread, (IntPtr.Size == 8) ? 0x022C : 0x0160); // found by analyzing the memory
return nativeId;
}
As of July 2022 the VS2022 IDE suggests using System.Environment.CurrentManagedThreadId instead of Thread.CurrentThread.ManagedThreadId
Quoting from https://docs.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1840:
System.Environment.CurrentManagedThreadId is a compact and efficient replacement of the Thread.CurrentThread.ManagedThreadId pattern.