System.Collections.dll - Dedproxy Missing DLL Error Fix for Windows
★★★★★ Verified File (12.07.2026) The file was obtained from the pack DedproxyDescription
Creation date: 28.01.2066 14:21:28
File version: 9.0.1125.51716
Antivirus scan: ✅ OK
Category: System
File size: 326.3 kb.
Architecture: 64-bit (x64)
✅ This file is compatible with 64-bit Windows and ❌ will not work on a 32-bit operating system.
How to determine your system architecture: Press keys Win+R , enter symbols wmic os get osarchitecture , press Enter.
Digital file signature System.Collections.dll
Issuer: Microsoft Code Signing PCA 2011
Encryption algorithm: SHA256
Time stamp: Oct 18 02:35:22 2025 GMT
System.Collections.dll is a dynamic link library (DLL) file used by Microsoft Windows and various applications. DLL files are compiled modules that contain code and data that can be used by multiple programs simultaneously, saving memory space and reducing system overhead.
SHA-1: d283bcc6f1d643a79b2a508e042ab229e568c2cf
SHA-256: a1678070c2d90d68a65d718f2a715e616e10b308e75730a93b4b005d61711eff
Where it is used
This file is primarily associated with the .NET Framework. It contains classes for collections such as arrays, lists, dictionaries, and queues. Common applications that might use this DLL include Microsoft Visual Studio, Windows PowerShell, or other development tools and frameworks.
Errors related to System.Collections.dll
If System.Collections.dll is missing or corrupted, you may encounter errors such as "System.Collections.dll not found" or "error loading System.Collections.dll." These issues can cause programs that rely on this DLL to fail to run properly.
File security
The provided file data indicates that the file is a legitimate part of the .NET Framework. However, any unknown or suspicious files found outside official installations should be treated with caution to prevent potential malware threats.
FAQ
How to fix System.Collections.dll missing error?
Download the correct file and copy it to the required program folder.
Is System.Collections.dll safe?
The original System.Collections.dll file was scanned by the antivirus, result: "OK".
Can I delete System.Collections.dll ?
You can move the file to a temporary folder and try to replace.
To fix the following errors:
System.Collections.dll was not found
The code execution cannot proceed because System.Collections.dll was not found
Failed to load System.Collections.dll
The procedure entry point ... could not be located in System.Collections.dll
1. Download links:
2b. Also try to copy to bin, lib folders.
2c. Try to copy System.Collections.dll C:\Program Files (x86)\Your program\
👉 Make backups of the files before proceeding with replacement.
How do I switch to the current Windows directory?
- Press and hold the key "win" on the keyboard and press the key "r" , then write %windir% and press the key Enter.
How to switch to the directory Program Files (x86) ?
- Press Win+R then enter %ProgramFiles(x86)% and after press Enter.
Advanced users only:
3. Copy into the folder C:\Windows\System32\
3b. Copy into the folder C:\Windows\SysWOW64\
How to fix errors
- Reinstall the program: Uninstall and then reinstall any application that reports an error with System.Collections.dll. This ensures all files are correctly placed.
- Update Windows: Ensure your operating system is up to date, as updates often include fixes for known issues related to DLLs.
- Manually replace System.Collections.dll: You can try replacing the corrupted file with a new one. Download from trusted sources and ensure you use the correct version for your architecture (64-bit in this case).
Conclusion
If you encounter errors related to System.Collections.dll, addressing them promptly can help maintain system stability and prevent further issues. Always be cautious when dealing with system files to avoid potential security risks.
️ System.AddIn.Contract.dll 3.5.30729.9141 32-bit (x86) | ️ System.AddIn.dll 3.5.30729.9141 32-bit (x86) | ️ System.AppContext.dll 9.0.1125.51716 32-bit (x86) | ️ System.AppContext.dll 8.0.1124.51707 32-bit (x86) | ️ System.Buffers.dll 4.6.28619.1 32-bit (x86) | ️ System.Buffers.dll 9.0.1125.51716 32-bit (x86) | ️ System.Buffers.dll 6.0.3624.51421 32-bit (x86) | ️ System.CodeDom.dll 9.0.1125.51716 64-bit (x64)
Microsoft Corporation