Coding⏱️ 4 min read📅 2026-06-19

How to Fix: Error: Visual Basic .NET compiler not found (Mono 2.6.7) (First MonoNet App)

Error fixing Visual Basic .NET compiler not found in MonoDevelop on Ubuntu.

Quick Answer: Install the Mono C# compiler using apt-get or add a Mono installation directory to your system's PATH.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🚀 How to Resolve This Issue
  3. 💡 Conclusion

Error: Visual Basic .NET compiler not found (Mono 2.6.7) (First MonoNet App) is an error that affects users who have installed MonoDevelop on their Ubuntu partition and are trying to develop .NET applications.

This error can be frustrating, especially for developers who are new to Mono or .NET development. However, with the right steps, you can resolve this issue and start developing your .NET applications.

⚠️ Common Causes

  • The primary reason for this error is that the Mono compiler for Visual Basic .NET is not properly installed or configured on your system. This can happen if the installation process was incomplete or if there were issues with the Mono package manager.
  • Another possible cause is that the MonoDevelop IDE is not configured to use the correct version of the Mono compiler. This can occur if the Mono version used by the IDE is outdated or incompatible with the .NET framework you are trying to develop.

🚀 How to Resolve This Issue

Installing and Configuring the Mono Compiler

  1. Step 1: Step 1: Open a terminal on your Ubuntu partition and run the command 'sudo apt-get update' to ensure that your package index is up-to-date.
  2. Step 2: Step 2: Run the command 'sudo apt-get install mono-complete' to install the full set of Mono tools, including the Visual Basic .NET compiler.
  3. Step 3: Step 3: Once the installation is complete, restart the MonoDevelop IDE and verify that the Visual Basic .NET compiler has been successfully installed.
  4. Step 4: Step 4: Check the MonoDevelop settings to ensure that the correct version of the Mono compiler is being used. You can do this by going to 'Edit' > 'Preferences' > 'Toolchain', and selecting the 'Mono' tab.
  5. Step 5: Step 5: Verify that your .NET project compiles successfully after making these changes.

Configuring MonoDevelop IDE Settings

  1. Step 1: Step 1: Open the 'Edit' menu in MonoDevelop and select 'Preferences'.
  2. Step 2: Step 2: In the 'Preferences' window, navigate to the 'Toolchain' tab.
  3. Step 3: Step 3: Select the 'Mono' tab and make sure that the correct version of the Mono compiler is selected. You can do this by checking the 'Compiler Version' dropdown menu.
  4. Step 4: Step 4: Verify that your .NET project compiles successfully after making these changes.

💡 Conclusion

By following these steps, you should be able to resolve the error and start developing your .NET applications using MonoDevelop on Ubuntu. Remember to restart the IDE and verify that the Visual Basic .NET compiler has been successfully installed before proceeding with your development work.

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