Interview question: What is the use of “using” keyword in C#?

In C#, we use “using” keyword for two different purpose.

1. “Using” keyword is used to include a namespace in the program. A program generally has multiple using statements.
2. The using statement is used to obtain a resource, execute a statement, and then dispose of that resource.

Example:

using (SqlConnection dbConn = new SqlConnection(conn)){

// Your code

} // automatically does the .Dispose call as if it was in a finally block

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