Which one is fast between SingleOrDefault and FirstOrDefault?

115

In my report contain product name, amount, country, sales person I want to create one prompt: sales territory.( Ex: asia, us, uk, aus), but territory column is not there in my model and source if u select the asia in prompt page-ll asian country results I want in report page I discussed with my friends and colleague, they told use the static choice function still I face this problem. If u know please tell me?

1046

Can primary key be null?

932

Please explain how to prevent the data from reloading and resetting when the screen is rotated?

925

What are the prerequisite tasks to achieve the session partition?

1252

How will you do data driven testing using Robot?

2549

Explain what is meant by polymorphism?

1070

Is profiler the only tool that has the ability to audit and identify ddl events? : sql server security

1049

Is real python free?

951

What is an update task?

1050

If I want to change the planning plant for the task list, how should I proceed?

1029

What ctrl z do?

578

when do you require backbone.js?

1

If you want to provide water or any chemical @ 50 meter height how much head will you prefer for any selected pump...consider it is M.S pipings...how much friction loss will be there...show with calculation.

2358

How do I add a row to a table in word 2007?

563