Exam Code: 70-521
Exam Name: Upgrade: Transition Your MCPD Windows Developer 3.5, or Enterprise Application Developer 3.5, Skills to MCPD Windows Developer 4
Certification Provider: Microsoft
Corresponding Certification: UPGRADE

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Updated: Sep 04, 2026

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Microsoft 70-521 Exam Overview:

Certification Vendor:	Microsoft
Exam Name:	Upgrade: Transition Your MCPD Windows Developer 3.5, or Enterprise Application Developer 3.5, Skills to MCPD Windows Developer 4
Exam Number:	70-521
Certificate Validity Period:	Retired, no longer valid for new certification
Related Certifications:	MCTS: .NET Framework 4, Data Access MCTS: .NET Framework 4, Windows Applications MCTS: .NET Framework 4, Service Communication Applications
Exam Duration:	120 minutes
Passing Score:	700 (on scale 1000)
Exam Format:	Multiple choice, Multiple response, Drag and drop, Case studies
Available Languages:	English, German, Japanese, French, Spanish
Real Exam Qty:	50-70
Exam Price:	$150–$165 USD
Recommended Training:	Microsoft Official .NET Framework 4 Training
Exam Registration:	Pearson VUE (historical)
Sample Questions:	Microsoft 70-521 Sample Questions
Exam Way:	Proctored onsite at Pearson VUE test centers; retired, no longer available
Pre Condition:	Hold valid MCPD: Windows Developer 3.5 or MCPD: Enterprise Application Developer 3.5 certification
Official Syllabus URL:	https://learn.microsoft.com/en-us/previous-versions/microsoft-65/exam-70-521

Microsoft 70-521 Exam Syllabus Topics:

Section	Weight	Objectives
Windows Forms Enhancements in .NET Framework 4	20%	- New controls and features - Application configuration and deployment - Data binding improvements
ADO.NET and Data Access in .NET 4	20%	- Entity Framework 4 features - Data Services and LINQ enhancements - Connection management and performance
Application Design and Architecture	10%	- Migrating 3.5 code to .NET Framework 4 - Performance and compatibility considerations
Windows Communication Foundation (WCF) 4 Updates	25%	- Simplified configuration and service discovery - REST and syndication support - Security and transaction improvements
Windows Presentation Foundation (WPF) 4 Improvements	25%	- Graphics and media integration - New controls and visual state manager - Data binding and layout enhancements

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