Why singleton class is sealed?
1) how to delete duplicate records from table in sql server 2005 2) what is run time polymorphism
What's the difference between system.string and system.text.stringbuilder classes?
What is the purpose of a constructor in c#?
Can abstract class instantiated c#?
How does array sort work?
Why var is used in c#?
How are Windows programs different from normal C-programs?
Can we extend sealed class in c#?
What is the symbol used for in c#?
Explain metadata in c#.
What is the difference between values and reference types?
What are the types of threading models ?