AB Info Tech

Discuss the difference between constants and read-only variables. While constants and read-only variable share many similarities, there are some important differences: Constants are evaluated at compile time, while the read-only variables are evaluated at run time. Constants support only value-type variables (the only exception being strings), while read-only variables can hold reference-type variables. Constants should be used when the value is not changing during run time, and read-only variables are used mostly when their actual value is unknown before run time. Read-only variables can only be initialised at the time of declaration or in a constructor. Explain what LINQ is. LINQ is an acronym for Language Integrated Query, and was introduced with Visual Studio 2008. LINQ is a set of features that extends query capabilities to the .NET language syntax by adding sets of new standard query operators that allow data manipulation, regardless of the data source. Supported ...