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struct System.Nullable`1
Assembly: System.Runtime
Represents a value type that can be assigned <see langword="null" /> .
Properties
public
bool
HasValue
Gets a value indicating whether the current <see cref="T:System.Nullable`1" /> object has a valid value of its underlying type.
public
T
Value
Gets the value of the current <see cref="T:System.Nullable`1" /> object if it has been assigned a valid underlying value.
Methods
public
bool
Equals(object other)
other
An object.
Returns <see langword="true" /> if the <paramref name="other" /> parameter is equal to the current <see cref="T:System.Nullable`1" /> object; otherwise, <see langword="false" /> .
This table describes how equality is defined for the compared values:
<list type="table">
<listheader>
<term> Return Value</term>
<description> Description</description>
</listheader>
<item>
<term>
<see langword="true" />
</term>
<description> The <see cref="P:System.Nullable`1.HasValue" /> property is <see langword="false" />, and the <paramref name="other" /> parameter is <see langword="null" /> (that is, two null values are equal by definition), OR the <see cref="P:System.Nullable`1.HasValue" /> property is <see langword="true" />, and the value returned by the <see cref="P:System.Nullable`1.Value" /> property is equal to the <paramref name="other" /> parameter.</description>
</item>
<item>
<term>
<see langword="false" />
</term>
<description> The <see cref="P:System.Nullable`1.HasValue" /> property for the current <see cref="T:System.Nullable`1" /> structure is <see langword="true" />, and the <paramref name="other" /> parameter is <see langword="null" />, OR the <see cref="P:System.Nullable`1.HasValue" /> property for the current <see cref="T:System.Nullable`1" /> structure is <see langword="false" />, and the <paramref name="other" /> parameter is not <see langword="null" />, OR the <see cref="P:System.Nullable`1.HasValue" /> property for the current <see cref="T:System.Nullable`1" /> structure is <see langword="true" />, and the value returned by the <see cref="P:System.Nullable`1.Value" /> property is not equal to the <paramref name="other" /> parameter.</description>
</item>
</list>
Indicates whether the current <see cref="T:System.Nullable`1" /> object is equal to a specified object.
public
int
GetHashCode() Returns The hash code of the object returned by the <see cref="P:System.Nullable`1.Value" /> property if the <see cref="P:System.Nullable`1.HasValue" /> property is <see langword="true" /> , or zero if the <see cref="P:System.Nullable`1.HasValue" /> property is <see langword="false" /> .
Retrieves the hash code of the object returned by the <see cref="P:System.Nullable`1.Value" /> property.
public
T
GetValueOrDefault() Returns The value of the <see cref="P:System.Nullable`1.Value" /> property if the <see cref="P:System.Nullable`1.HasValue" /> property is <see langword="true" /> ; otherwise, the default value of the underlying type.
Retrieves the value of the current <see cref="T:System.Nullable`1" /> object, or the default value of the underlying type.
public
string
ToString() Returns The text representation of the value of the current <see cref="T:System.Nullable`1" /> object if the <see cref="P:System.Nullable`1.HasValue" /> property is <see langword="true" /> , or an empty string ("") if the <see cref="P:System.Nullable`1.HasValue" /> property is <see langword="false" /> .
Returns the text representation of the value of the current <see cref="T:System.Nullable`1" /> object.
protected
void
Finalize()
Inherited from object
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
public
Type
GetType()
Inherited from object
Returns The exact runtime type of the current instance.
Gets the <see cref="T:System.Type" /> of the current instance.
protected
object
MemberwiseClone()
Inherited from object
Returns A shallow copy of the current <see cref="T:System.Object" /> .
Creates a shallow copy of the current <see cref="T:System.Object" /> .