Given the following 3 file classes:

file class MyClass
{
}

file class MyClass2
{
}

file class MyClass3
{
    public int MyMember { get; init; }
}

By compiling this code and then decompiling this C# code, the file classes now look like:

internal class <Class1>FFEAE62924BA736A3C9E8DE39EA3099D227B65B02C0A6BC7FECCB5FF0D5B9D8B3__MyClass
{
}

internal class <Class1>FFEAE62924BA736A3C9E8DE39EA3099D227B65B02C0A6BC7FECCB5FF0D5B9D8B3__MyClass2
{
}

internal class <Class1>FFEAE62924BA736A3C9E8DE39EA3099D227B65B02C0A6BC7FECCB5FF0D5B9D8B3__MyClass3
{
    public int MyMember { get; init; }
}

I understand that <Class1> is the name of the source file where the file class was defined, and MyClass... is the name of the file class.

What I don’t understand is this very long, seemingly ID between the two:

FFEAE62924BA736A3C9E8DE39EA3099D227B65B02C0A6BC7FECCB5FF0D5B9D8B3

From what I understand, it seems to vary based on the source file name, which is surprising when the text between two angle brackets, <Class1>, already seems to play a role.

How does the C# compiler produce this ID? What are the factors that affect it? I could not find any information about it on the internet. I would like to know for a reason, not just because I’m curious.