# DateTimeOffset.LessThan(DateTimeOffset, DateTimeOffset) 演算子

## 定義

``````public:
static bool operator <(DateTimeOffset left, DateTimeOffset right);``````
``public static bool operator < (DateTimeOffset left, DateTimeOffset right);``
``static member ( < ) : DateTimeOffset * DateTimeOffset -> bool``
``Public Shared Operator < (left As DateTimeOffset, right As DateTimeOffset) As Boolean``

left
DateTimeOffset

right
DateTimeOffset

#### 戻り値

`left`UtcDateTime の値が `right`UtcDateTime の値より前の場合は `true`。それ以外の場合は `false``true` if the UtcDateTime value of `left` is earlier than the UtcDateTime value of `right`; otherwise, `false`.

## 注釈

LessThan メソッドは、DateTimeOffset オブジェクトの小なり演算子の演算を定義します。The LessThan method defines the operation of the less than operator for DateTimeOffset objects. 次のようなコードが有効になります。It enables code such as the following:

``````DateTimeOffset date1 = new DateTimeOffset(2007, 6, 3, 14, 45, 0,
new TimeSpan(-7, 0, 0));
DateTimeOffset date2 = new DateTimeOffset(2007, 6, 3, 15, 45, 0,
new TimeSpan(-6, 0, 0));
DateTimeOffset date3 = new DateTimeOffset(date1.DateTime,
new TimeSpan(-8, 0, 0));
Console.WriteLine(date1 < date2);        // Displays False
Console.WriteLine(date1 < date3);        // Displays True
``````
``````Dim date1 As New DateTimeOffset(#6/3/2007 2:45PM#, _
New TimeSpan(-7, 0, 0))
Dim date2 As New DateTimeOffset(#6/3/2007 3:45PM#, _
New TimeSpan(-6, 0, 0))
Dim date3 As New DateTimeOffset(date1.DateTime, _
New TimeSpan(-8, 0, 0))
Console.WriteLine(date1 < date2)        ' Displays False
Console.WriteLine(date1 < date3)        ' Displays True
``````

``````return left.UtcDateTime < right.UtcDateTime;
``````
``````Return left.UtcDateTime < right.UtcDateTime
``````

カスタム演算子をサポートしない言語では、代わりに Compare メソッドを呼び出すことができます。Languages that do not support custom operators can call the Compare method instead. また、次の例に示すように、一部の言語では、LessThan メソッドを直接呼び出すこともできます。In addition, some languages can also call the LessThan method directly, as the following example shows.

``````Dim date1 As New DateTimeOffset(#6/3/2007 2:45PM#, _
New TimeSpan(-7, 0, 0))
Dim date2 As New DateTimeOffset(#6/3/2007 3:45PM#, _
New TimeSpan(-6, 0, 0))
Dim date3 As New DateTimeOffset(date1.DateTime, _
New TimeSpan(-8, 0, 0))
Console.WriteLine(DateTimeOffset.op_LessThan(date1, date2))  ' Displays False
Console.WriteLine(DateTimeOffset.op_LessThan(date1, date3))  ' Displays True
``````

この演算子の同等のメソッドは DateTimeOffset.Compare(DateTimeOffset, DateTimeOffset)The equivalent method for this operator is DateTimeOffset.Compare(DateTimeOffset, DateTimeOffset)