1. Database performance
1. Table design
2. Primary key and index design
3. Blocking
4. Deadlock
5. SQL query performance optimization
2. C# language
1. Garbage collection
2. String operation
3. Multi-threading
4. Type system
5. Exception handling
6. Reflection
7. Basic coding skills
3. ADO.NET
1. Apply some thinking principles of ADO.NET
2.Connection
3. Command
4.DataReader
5.DataSet
4. Asp.net
1. Reduce the round trip process
2. Avoid blockage and long working hours
3. Caching and multithreading
4. System resources, page processing and ViewSatae
5. JavaScript
1. Basic principles of Jscript performance optimization
2. Optimization of Jscript language itself
3. DOM related
4. Others