Load module to modify memory inside a executable

[RedDot-3ND7355]

Somehow can't load a module that's inside an executeable.
I may be doing something wrong... or simply dumb tbh.
It may be loading but simply can't find the pattern at all.

Here's the steps I did

Code above is just a check to see if the process exists

int neededid = System.Diagnostics.Process.GetProcessesByName("Process name here")[0].Id;
ProcessSharp = new ProcessSharp(neededid, MemoryType.Local);
ProcessSharp.Memory = new ExternalProcessMemory(ProcessSharp.Handle);
 IMemoryPattern FuncOffsetPattern = new DwordPattern("02 7B ?? ?? ?? 04 39 AE ?? ?? ??"); 
// 02 ?? ?? ?? ?? ?? 39 ?? ?? ?? ?? OR 02 7B D1 07 00 04 39 AE 00 00 00 (pattern does exist in .exe itself within an module(dll) inside of it)
 var scanner = new PatternScanner(ProcessSharp.ModuleFactory.MainModule);
var Result = scanner.Find(FuncOffsetPattern);
if (Result.Found)
{
 byte[] managedArray = new byte[0];
 managedArray = ProcessSharp.Memory.Read(Result.BaseAddress, FuncOffsetPattern.GetBytes().Count);
 managedArray[6] = 0x3A;
 ProcessSharp.Memory.Write(Result.BaseAddress, managedArray);
}
else
{
 // bla bla here
}

Any guidance would be really helpful!

Edit:
The file is named as such:
Thefile.exe and there's a Thefile.dll inside of it. Which I somehow can't seem to find and/or match a pattern from it.

[icebolt9000]

if am not wrong you gotta change the 'ProcessSharp.ModuleFactory.MainModule' to desired module, not sure still useful bit late reply

var scanner = new PatternScanner(ProcessSharp.ModuleFactory.MainModule);