Senior .NET Developer & Architect Skills List you must improve

Programming

• General Programming Skills (Data Types, Iteration, Functions)
• Algorithm Proficiency
• Unary/Binary Operation Proficiency
• Declarative Programming Fundamentals
• Regular Expression Familiarity
• Framework Design Guideline Proficiency
• Collection/Array Differences

Language Specific Skills

• C# (or VB) Mastery
• Enumerators
• Delegates and Events
• Nullable Types
• Generics
• Preprocessor Directives
• P/Invoke Fundamentals
• COM Interop Fundamentals
• XML Documentation

CLR/Framework

• CLI Fundamentals (Memory Management, Assembly Loading)
• Framework Type Mapping (int -> Int32, long -> Int64)
• IL Fundamentals
• Framework Navigation Fundamentals
• Reflection / Dynamic Invocation
• Understanding of the 'Object' Type
• Core Assemblies
• Global Assembly Cache (GAC)
• Boxing/Unboxing Fundamentals

ASP.NET

• ASP.NET Concepts (CodeBehind, Compilation Model, Intrinsic Objects, ViewState, etc)
• ASP.NET Control Proficiency
• ASP.NET Page Life Cycle
• ASP.NET HttpHandler, HttpHandlerFactory, and HttpModule Proficiency
• Object-Oriented Nature of ASP.NET

Client-Side Development / General Web Development

• JavaScript Proficiency (Closures, Anonymous Calls, etc)
• CSS Proficiency (Specificity, Selectors, Rules, etc)
• DOM Familiarity
• XHTML Mastery (and it's relation to HTML)
• Web Standards Familiarity
• MOS (Mozilla, Opera, Safari) and IE Development Differences
• Firefox Utilities (Firebug, Web Developer Toolbar)
• Core Ajax & JQuery Fundamentals
• Classic Web Development Concepts (State Management, Stateless Development)
• WPF
• Silverlight

.NET Data

• ADO.NET Fundamentals (DataTable, DataSet, DataColumn, etc)
• LINQ
• Entity Framework
• Data Binding Fundamentals
• XML Serialization

.NET Concepts

• Assemblies
• Exception Handling
• Streaming
• Attributes
• Versioning
• Strong Naming
• Disposable Resources (and IDisposable)

Object-Oriented Principles

• OOP Principles (Inheritance, Polymorphism, Encapsulation) Proficiency
• OOD GRASP Patterns Mastery
• OOD GoF Pattern Fundamentals
• UML Fundamentals

Enterprise Architecture

• N-Tier Architectural Design
• Service Oriented Architecture Fundamentals
• Component Oriented Development Fundamentals
• Enterprise Services/COM Fundamentals
• MSMQ Fundamentals
• Web Service/WS-* Fundamentals
• RSS/Atom Fundamentals
• WCF Fundamentals (Address, Binding, Contract)

Data

• Set Theory Fundamentals
• Database Design/Data Modeling Mastery
• ACID and Normalization Concepts
• SQL Server 2005/2008 Interaction Familiarity
• SQL Server 2005/2008  Query Optimization
• SQL Server 2005/2008  Index Design
• SQL Server 2005/2008  Tuning
• T-SQL Proficiency
• O/R Mapper Familiarity
• XML/DTD/XSD/XSLT/XPath Fundamentals

System Technologies

• Windows Server 2003/2008 Familiarity
• IIS 6.0/7.0/7.5 Proficiency
• Component Services (COM+) Familiarity (the tool)
• TCP/IP Fundamentals (Basic IP Theory, DNS, ping, tracert)
• Networking Fundamentals (Routers, Switches, DHCP Servers)
• Web Server Farm Fundamentals
• 'Run' Window Proficiency
• Batch File Fundamentals
• Windows Client Proficiency (Network Mapping, File Operations)

General Software Development

• Software Development Life Cycle Fundamentals
• Iterative/Agile/Waterfall/MSF Familiarization
• Version Control Familiarity (CVS, Subversion, etc)

Quality Assurance

• NUnit Familiarity
• Unit/Regression Testing Familiarity
• Profiling Fundamentals

General

• College Algebra Proficiency
• Statistics Fundamentals (probabilities mainly)
• Calculus Theory Fundamentals (rates of change fundamentals)
• Cryptography Fundamentals (asymmetrical, hash, checksum)
• Proper English Grammar (who vs. whom, etc)
• Solid Spelling Skills

Attitude

• Results Focused Attitude
• Vision Oriented (mainly for Architects and Team Leads)
• Paradigm Shifting Abilities
• Unlearning Abilities (the ability to unlearn obsolete paradigms)
• High Standards ("takes pride in his or her work")
• Unbiased to Vendors (i.e. doesn't say Microsoft SUCKS! or Linux blows!)

Ethics

• Patience for Technology and Other People
• Strong Ethical Nature (Honest, Trustworthy)
• Common Sense Sexual Harassment Law Adherence (a.k.a. maturity)
• Common Sense Use of Proper Language In and Around the Work Place (a.k.a. maturity)
• Common Sense Politics/Religious Respect
• Work Place Software Piracy Law Adherence
• Gender Neutral Language Guideline Adherence (mainly in documentation and professional correspondence)