Answer Posted / mistry
Nullable types are instances of the System.Nullable struct.
A nullable type can represent the normal range of values
for its underlying value type, plus an additional null
value. For example, a Nullable<Int32>, pronounced "Nullable
of Int32," can be assigned any value from -2147483648 to
2147483647, or it can be assigned the null value. A
Nullable<bool> can be assigned the values true or false, or
null. The ability to assign null to numeric and Boolean
types is particularly useful when dealing with databases
and other data types containing elements that may not be
assigned a value.
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