There were a lot of questions asked, so I will list the topic (and add a what is "topic" and know pros/cons). Extreme programming, what is a transaction, various SDLC design approaches, what is a namespace, define a good test case, what is a stored proc, webservice? design patterns? linker? compiler? access modifiers? stack vs. queue? arrays vs. linked lists? sorting algorithms? recursion? OOP principles?
1984An abstract class is inherited, an Interface also inherited(multiple inheritance), How it differences.
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What is the namespace for the thread class?
List out two different types of errors in c#?
To allow an element to be accessed using a unique key which .NET collection class is used ?
What language is c# similar to?
Why is c# a good programming language?
What is xor operation?
What is difference between int and int in c#?
How is lazy loading achieved?
List the differences between method overriding and method overloading?
What do you understand by the terms datareader object and dataset object?
What does console mean c#?
What is inline function in c#?
Is friend a constructor?
Why we use anonymous methods in c#?
Difference between debug.write and trace.write?