GetNativeMethodName.cs

private string GetNativeMethodName(ulong address)
{
    var symbol = new NativeDbgHelp.SYMBOL_INFO();
    symbol.MaxNameLen = 1024;
    symbol.SizeOfStruct = (uint)Marshal.SizeOf(symbol) - 1024;   // char buffer is not counted
    // the ANSI version of SymFromAddr is called so each character is 1 byte long

    if (NativeDbgHelp.SymFromAddr(_hProcess, address, out var displacement, ref symbol))
    {
        var buffer = new StringBuilder(symbol.Name.Length);

        // remove weird "$##" at the end of some symbols
        var pos = symbol.Name.LastIndexOf("$##");
        if (pos == -1)
            buffer.Append(symbol.Name);
        else
            buffer.Append(symbol.Name, 0, pos);

        // add offset if any
        if (displacement != 0)
            buffer.Append($"+0x{displacement}");

        return buffer.ToString();
    }

    // default value is the just the address in HEX
    return $"0x{address:x}";
}