Software⏱️ 2 min read📅 2026-05-31

How to Fix 0xE0434352 Error – How do I fix a .NET windows application crashing at startup with Exception code: 0xE0434352?

The application crashes at startup with an exception code 0xE0434352, likely due to a .NET runtime issue.

Quick Answer: Check the .NET framework version and ensure it matches the one used during deployment.

The error code 0xE0434352 is a .NET runtime exception that occurs when the Common Language Runtime (CLR) encounters an unhandled exception in your application. This typically happens when there's a mismatch between the CLR version used by your application and the one installed on the target machine.

Root Causes of the Error

  • Mismatch between CLR version used by your application and the one installed on the target machine.

How to Resolve This Issue

Method 1: Use a .NET runtime version that matches the target machine's CLR version

  1. Step 1: Check the CLR version used by your application and ensure it matches the one installed on the target machine.

Method 2: Use a .NET runtime version that is compatible with your application

  1. Step 1: If you're using .NET Framework 4.6 or later, try to run your application with this version.

Wrapping Up

To resolve the issue of a .NET Windows Forms application crashing at startup with exception code 0xE0434352, ensure that the CLR version used by your application matches the one installed on the target machine or use a compatible .NET runtime version.

Did this fix your problem?

If not, try searching for specific error codes.

🔍 Search Error Database

❓ Frequently Asked Questions