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Professional C# 6 and .NET Core 1.0 by Christian Nagel

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8 Operators and Casts

What’s In This Chapter?

  • Operators in C#
  • Using new C# 6 Operators nameof and null propagation
  • Implicit and explicit Conversions
  • Converting value types to reference types using boxing
  • Comparing value types and reference types
  • Overloading the standard operators for custom types
  • Implementing the Index Operator
  • Converting between reference types by casting

Wrox.com Code Downloads for This Chapter

The wrox.com code downloads for this chapter are found at www.wrox.com/go/professionalcsharp6 on the Download Code tab. The code for this chapter is divided into the following major examples:

  • OperatorOverloadingSample
  • OperatorOverloadingSample2
  • OverloadingComparisonSample
  • CustomIndexerSample
  • CastingSample

Operators and Casts

The preceding chapters have covered most of what you need to start writing useful programs using C#. This chapter completes the discussion of the essential language elements and illustrates some powerful aspects of C# that enable you to extend its capabilities.

Operators

C# operators are very similar to C++ and Java operators; however, there are differences.

C# supports the operators listed in the following table:

Category Operator
Arithmetic +* / %
Logical & | ^ ˜ && ║ !
String concatenation +
Increment and decrement ++ – –
Bit shifting << >>
Comparison == != < > <= >=
Assignment = += -= *= /= %= &= |= ^= <<= >>=
Member access (for objects and structs) .
Indexing (for arrays and indexers) []
Cast ()
Conditional ...

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