I will fix and troubleshoot your vb net or winforms application

J
johnjmclean
J
johnjmclean
John Mclean
fix and troubleshoot your vb net or winforms application
Full Screen
fix and troubleshoot your vb net or winforms application

About this gig

Having problems with a VB.NET or WinForms application?


I can help diagnose and fix bugs, errors and other problems in your existing .NET application.


I have 20+ years of professional experience developing and maintaining .NET software, including VB.NET, C#, WinForms, .NET Framework and SQL Server.


I can help with:

  • VB.NET and WinForms bugs
  • Runtime errors and crashes
  • Build and compile errors
  • Visual Studio or .NET upgrade problems
  • SQL Server and database issues
  • Performance problems
  • Difficult legacy code
  • Refactoring and maintenance


I specialise in working with existing and legacy applications. If your code is old, poorly documented or difficult to understand, I can investigate the problem, identify the cause and implement a practical fix.


Technologies: C# VB.NET WinForms .NET Framework .NET SQL Server Visual Studio


Please contact me before ordering if you have multiple issues, a large application or a complex problem. Send me a description of the issue and, if possible, the error message or relevant code, and I can advise on the most appropriate package.

  • Programming language

    • VB

  • Expertise

    • Debugging
    • Design
    • Databases

  • Frontend framework

    • Angular
    • React.js
    • Other

Get to know John Mclean

John Mclean

Senior C Sharp and VB NET Developer

  • FromUnited Kingdom
  • Member sinceJul 2026

  • Languages

    English
I’m a UK-based software developer specialising in maintaining and modernising legacy .NET applications, particularly VB.NET and WinForms systems that businesses still depend on. Many organisations rely on internal applications written years ago that are difficult to maintain, hard to upgrade, or incompatible with newer versions of Windows and .NET. I help teams safely improve and modernise these systems without risky full rewrites.

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