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C#

Default values


The following categories of variables are automatically initialized to their default values:

  • Static variables.

  • Instance variables of class instances.

  • Array elements.

The default value of a variable depends on the type of the variable and is determined as follows:

  • For a variable of a value-type, the default value is the same as the value computed by the value-type’s default constructor .

  • For a variable of a reference-type, the default value is null.

Initialization to default values is typically done by having the memory manager or garbage collector initialize memory to all-bits-zero before it is allocated for use. For this reason, it is convenient to use all-bits-zero to represent the null reference.



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