ListDictionary 클래스

정의

단일 연결 목록을 사용하여 IDictionary를 구현합니다.Implements IDictionary using a singly linked list. 일반적으로 10개 미만의 항목이 포함된 컬렉션에 사용하는 것이 좋습니다.Recommended for collections that typically include fewer than 10 items.

public ref class ListDictionary : System::Collections::IDictionary
[System.Serializable]
public class ListDictionary : System.Collections.IDictionary
type ListDictionary = class
    interface IDictionary
    interface ICollection
    interface IEnumerable
Public Class ListDictionary
Implements IDictionary
상속
ListDictionary
특성
구현

예제

다음 코드 예제에서는 ListDictionary의 여러 속성과 메서드를 보여 줍니다.The following code example demonstrates several of the properties and methods of ListDictionary.

#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;

void PrintKeysAndValues1( IDictionary^ myCol );
void PrintKeysAndValues2( IDictionary^ myCol );
void PrintKeysAndValues3( ListDictionary^ myCol );

int main()
{
   // Creates and initializes a new ListDictionary.
   ListDictionary^ myCol = gcnew ListDictionary;
   myCol->Add( "Braeburn Apples", "1.49" );
   myCol->Add( "Fuji Apples", "1.29" );
   myCol->Add( "Gala Apples", "1.49" );
   myCol->Add( "Golden Delicious Apples", "1.29" );
   myCol->Add( "Granny Smith Apples", "0.89" );
   myCol->Add( "Red Delicious Apples", "0.99" );

   // Display the contents of the collection using for each. This is the preferred method.
   Console::WriteLine( "Displays the elements using for each:" );
   PrintKeysAndValues1( myCol );

   // Display the contents of the collection using the enumerator.
   Console::WriteLine( "Displays the elements using the IDictionaryEnumerator:" );
   PrintKeysAndValues2( myCol );

   // Display the contents of the collection using the Keys, Values, Count, and Item properties.
   Console::WriteLine( "Displays the elements using the Keys, Values, Count, and Item properties:" );
   PrintKeysAndValues3( myCol );

   // Copies the ListDictionary to an array with DictionaryEntry elements.
   array<DictionaryEntry>^myArr = gcnew array<DictionaryEntry>(myCol->Count);
   myCol->CopyTo( myArr, 0 );

   // Displays the values in the array.
   Console::WriteLine( "Displays the elements in the array:" );
   Console::WriteLine( "   KEY                       VALUE" );
   for ( int i = 0; i < myArr->Length; i++ )
      Console::WriteLine( "   {0,-25} {1}", myArr[ i ].Key, myArr[ i ].Value );
   Console::WriteLine();

   // Searches for a key.
   if ( myCol->Contains( "Kiwis" ) )
      Console::WriteLine( "The collection contains the key \"Kiwis\"." );
   else
      Console::WriteLine( "The collection does not contain the key \"Kiwis\"." );

   Console::WriteLine();

   // Deletes a key.
   myCol->Remove( "Plums" );
   Console::WriteLine( "The collection contains the following elements after removing \"Plums\":" );
   PrintKeysAndValues2( myCol );

   // Clears the entire collection.
   myCol->Clear();
   Console::WriteLine( "The collection contains the following elements after it is cleared:" );
   PrintKeysAndValues2( myCol );
}

// Uses the for each statement which hides the complexity of the enumerator.
// NOTE: The for each statement is the preferred way of enumerating the contents of a collection.
void PrintKeysAndValues1( IDictionary^ myCol )  {
   Console::WriteLine( "   KEY                       VALUE" );
   for each ( DictionaryEntry^ de in myCol )
      Console::WriteLine( "   {0,-25} {1}", de->Key, de->Value );
   Console::WriteLine();
}

// Uses the enumerator. 
void PrintKeysAndValues2( IDictionary^ myCol )
{
   IDictionaryEnumerator^ myEnumerator = myCol->GetEnumerator();
   Console::WriteLine( "   KEY                       VALUE" );
   while ( myEnumerator->MoveNext() )
      Console::WriteLine( "   {0,-25} {1}", myEnumerator->Key, myEnumerator->Value );
   Console::WriteLine();
}

// Uses the Keys, Values, Count, and Item properties.
void PrintKeysAndValues3( ListDictionary^ myCol )
{
   array<String^>^myKeys = gcnew array<String^>(myCol->Count);
   myCol->Keys->CopyTo( myKeys, 0 );
   Console::WriteLine( "   INDEX KEY                       VALUE" );
   for ( int i = 0; i < myCol->Count; i++ )
      Console::WriteLine( "   {0,-5} {1,-25} {2}", i, myKeys[ i ], myCol[ myKeys[ i ] ] );
   Console::WriteLine();
}

/*
This code produces the following output.

Displays the elements using for each:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

Displays the elements using the IDictionaryEnumerator:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

Displays the elements using the Keys, Values, Count, and Item properties:
   INDEX KEY                       VALUE
   0     Braeburn Apples           1.49
   1     Fuji Apples               1.29
   2     Gala Apples               1.49
   3     Golden Delicious Apples   1.29
   4     Granny Smith Apples       0.89
   5     Red Delicious Apples      0.99

Displays the elements in the array:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

The collection does not contain the key "Kiwis".

The collection contains the following elements after removing "Plums":
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

The collection contains the following elements after it is cleared:
   KEY                       VALUE


*/
using System;
using System.Collections;
using System.Collections.Specialized;

public class SamplesListDictionary  {

   public static void Main()  {

      // Creates and initializes a new ListDictionary.
      ListDictionary myCol = new ListDictionary();
      myCol.Add( "Braeburn Apples", "1.49" );
      myCol.Add( "Fuji Apples", "1.29" );
      myCol.Add( "Gala Apples", "1.49" );
      myCol.Add( "Golden Delicious Apples", "1.29" );
      myCol.Add( "Granny Smith Apples", "0.89" );
      myCol.Add( "Red Delicious Apples", "0.99" );

      // Display the contents of the collection using foreach. This is the preferred method.
      Console.WriteLine( "Displays the elements using foreach:" );
      PrintKeysAndValues1( myCol );

      // Display the contents of the collection using the enumerator.
      Console.WriteLine( "Displays the elements using the IDictionaryEnumerator:" );
      PrintKeysAndValues2( myCol );

      // Display the contents of the collection using the Keys, Values, Count, and Item properties.
      Console.WriteLine( "Displays the elements using the Keys, Values, Count, and Item properties:" );
      PrintKeysAndValues3( myCol );

      // Copies the ListDictionary to an array with DictionaryEntry elements.
      DictionaryEntry[] myArr = new DictionaryEntry[myCol.Count];
      myCol.CopyTo( myArr, 0 );

      // Displays the values in the array.
      Console.WriteLine( "Displays the elements in the array:" );
      Console.WriteLine( "   KEY                       VALUE" );
      for ( int i = 0; i < myArr.Length; i++ )
         Console.WriteLine( "   {0,-25} {1}", myArr[i].Key, myArr[i].Value );
      Console.WriteLine();

      // Searches for a key.
      if ( myCol.Contains( "Kiwis" ) )
         Console.WriteLine( "The collection contains the key \"Kiwis\"." );
      else
         Console.WriteLine( "The collection does not contain the key \"Kiwis\"." );
      Console.WriteLine();

      // Deletes a key.
      myCol.Remove( "Plums" );
      Console.WriteLine( "The collection contains the following elements after removing \"Plums\":" );
      PrintKeysAndValues1( myCol );

      // Clears the entire collection.
      myCol.Clear();
      Console.WriteLine( "The collection contains the following elements after it is cleared:" );
      PrintKeysAndValues1( myCol );
   }

   // Uses the foreach statement which hides the complexity of the enumerator.
   // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   public static void PrintKeysAndValues1( IDictionary myCol )  {
      Console.WriteLine( "   KEY                       VALUE" );
      foreach ( DictionaryEntry de in myCol )
         Console.WriteLine( "   {0,-25} {1}", de.Key, de.Value );
      Console.WriteLine();
   }

   // Uses the enumerator. 
   // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   public static void PrintKeysAndValues2( IDictionary myCol )  {
      IDictionaryEnumerator myEnumerator = myCol.GetEnumerator();
      Console.WriteLine( "   KEY                       VALUE" );
      while ( myEnumerator.MoveNext() )
         Console.WriteLine( "   {0,-25} {1}", myEnumerator.Key, myEnumerator.Value );
      Console.WriteLine();
   }

   // Uses the Keys, Values, Count, and Item properties.
   public static void PrintKeysAndValues3( ListDictionary myCol )  {
      String[] myKeys = new String[myCol.Count];
      myCol.Keys.CopyTo( myKeys, 0 );

      Console.WriteLine( "   INDEX KEY                       VALUE" );
      for ( int i = 0; i < myCol.Count; i++ )
         Console.WriteLine( "   {0,-5} {1,-25} {2}", i, myKeys[i], myCol[myKeys[i]] );
      Console.WriteLine();
   }
}

/*
This code produces output similar to the following.
Note that because a dictionary is implemented for fast keyed access the order
of the items in the dictionary are not gauranteed and, as a result, should not
be depended on.

Displays the elements using foreach:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

Displays the elements using the IDictionaryEnumerator:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

Displays the elements using the Keys, Values, Count, and Item properties:
   INDEX KEY                       VALUE
   0     Braeburn Apples           1.49
   1     Fuji Apples               1.29
   2     Gala Apples               1.49
   3     Golden Delicious Apples   1.29
   4     Granny Smith Apples       0.89
   5     Red Delicious Apples      0.99

Displays the elements in the array:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

The collection does not contain the key "Kiwis".

The collection contains the following elements after removing "Plums":
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

The collection contains the following elements after it is cleared:
   KEY                       VALUE


*/
Imports System.Collections
Imports System.Collections.Specialized

Public Class SamplesListDictionary   

   Public Shared Sub Main()

      ' Creates and initializes a new ListDictionary.
      Dim myCol As New ListDictionary()
      myCol.Add("Braeburn Apples", "1.49")
      myCol.Add("Fuji Apples", "1.29")
      myCol.Add("Gala Apples", "1.49")
      myCol.Add("Golden Delicious Apples", "1.29")
      myCol.Add("Granny Smith Apples", "0.89")
      myCol.Add("Red Delicious Apples", "0.99")

      ' Display the contents of the collection using For Each. This is the preferred method.
      Console.WriteLine("Displays the elements using For Each:")
      PrintKeysAndValues(myCol)

      ' Display the contents of the collection using the enumerator.
      Console.WriteLine("Displays the elements using the IDictionaryEnumerator:")
      PrintKeysAndValues2(myCol)

      ' Display the contents of the collection using the Keys, Values, Count, and Item properties.
      Console.WriteLine("Displays the elements using the Keys, Values, Count, and Item properties:")
      PrintKeysAndValues3(myCol)

      ' Copies the ListDictionary to an array with DictionaryEntry elements.
      Dim myArr(myCol.Count) As DictionaryEntry
      myCol.CopyTo(myArr, 0)

      ' Displays the values in the array.
      Console.WriteLine("Displays the elements in the array:")
      Console.WriteLine("   KEY                       VALUE")
      Dim i As Integer
      For i = 0 To myArr.Length - 1
         Console.WriteLine("   {0,-25} {1}", myArr(i).Key, myArr(i).Value)
      Next i
      Console.WriteLine()

      ' Searches for a key.
      If myCol.Contains("Kiwis") Then
         Console.WriteLine("The collection contains the key ""Kiwis"".")
      Else
         Console.WriteLine("The collection does not contain the key ""Kiwis"".")
      End If
      Console.WriteLine()

      ' Deletes a key.
      myCol.Remove("Plums")
      Console.WriteLine("The collection contains the following elements after removing ""Plums"":")
      PrintKeysAndValues(myCol)

      ' Clears the entire collection.
      myCol.Clear()
      Console.WriteLine("The collection contains the following elements after it is cleared:")
      PrintKeysAndValues(myCol)

   End Sub


   ' Uses the For Each statement which hides the complexity of the enumerator.
   ' NOTE: The For Each statement is the preferred way of enumerating the contents of a collection.
   Public Shared Sub PrintKeysAndValues(myCol As IDictionary)

      Console.WriteLine("   KEY                       VALUE")
      Dim de As DictionaryEntry
      For Each de In  myCol
         Console.WriteLine("   {0,-25} {1}", de.Key, de.Value)
      Next de
      Console.WriteLine()

   End Sub


   ' Uses the enumerator. 
   ' NOTE: The For Each statement is the preferred way of enumerating the contents of a collection.
   Public Shared Sub PrintKeysAndValues2(myCol As IDictionary)
      Dim myEnumerator As IDictionaryEnumerator = myCol.GetEnumerator()

      Console.WriteLine("   KEY                       VALUE")
      While myEnumerator.MoveNext()
         Console.WriteLine("   {0,-25} {1}", myEnumerator.Key, myEnumerator.Value)
      End While
      Console.WriteLine()

   End Sub


   ' Uses the Keys, Values, Count, and Item properties.
   Public Shared Sub PrintKeysAndValues3(myCol As ListDictionary)
      Dim myKeys(myCol.Count) As [String]
      myCol.Keys.CopyTo(myKeys, 0)

      Console.WriteLine("   INDEX KEY                       VALUE")
      Dim i As Integer
      For i = 0 To myCol.Count - 1
         Console.WriteLine("   {0,-5} {1,-25} {2}", i, myKeys(i), myCol(myKeys(i)))
      Next i
      Console.WriteLine()

   End Sub

End Class


'This code produces the following output.
'Note that because a dictionary is implemented for fast keyed access the order
'of the items in the dictionary are not gauranteed and, as a result, should not
'be depended on.
'
'Displays the elements using for each:
'   KEY                       VALUE
'   Braeburn Apples           1.49
'   Fuji Apples               1.29
'   Gala Apples               1.49
'   Golden Delicious Apples   1.29
'   Granny Smith Apples       0.89
'   Red Delicious Apples      0.99
'
'Displays the elements using the IDictionaryEnumerator:
'   KEY                       VALUE
'   Braeburn Apples           1.49
'   Fuji Apples               1.29
'   Gala Apples               1.49
'   Golden Delicious Apples   1.29
'   Granny Smith Apples       0.89
'   Red Delicious Apples      0.99
'
'Displays the elements using the Keys, Values, Count, and Item properties:
'   INDEX KEY                       VALUE
'   0     Braeburn Apples           1.49
'   1     Fuji Apples               1.29
'   2     Gala Apples               1.49
'   3     Golden Delicious Apples   1.29
'   4     Granny Smith Apples       0.89
'   5     Red Delicious Apples      0.99
'
'Displays the elements in the array:
'   KEY                       VALUE
'   Braeburn Apples           1.49
'   Fuji Apples               1.29
'   Gala Apples               1.49
'   Golden Delicious Apples   1.29
'   Granny Smith Apples       0.89
'   Red Delicious Apples      0.99
'
'The collection does not contain the key "Kiwis".
'
'The collection contains the following elements after removing "Plums":
'   KEY                       VALUE
'   Braeburn Apples           1.49
'   Fuji Apples               1.29
'   Gala Apples               1.49
'   Golden Delicious Apples   1.29
'   Granny Smith Apples       0.89
'   Red Delicious Apples      0.99
'
'The collection contains the following elements after it is cleared:
'   KEY                       VALUE
'

설명

이는 단일 연결 된 목록을 사용 하 여 IDictionary를 간단 하 게 구현한 것입니다.This is a simple implementation of IDictionary using a singly linked list. 요소 수가 10 이하인 경우 Hashtable 보다 작고 빠릅니다.It is smaller and faster than a Hashtable if the number of elements is 10 or less. 이렇게 해서는 안 성능이 많은 수의 요소에 대 한 중요 한 경우.This should not be used if performance is important for large numbers of elements.

ListDictionary 항목의 순서는 보장 되지 않습니다. 코드는 현재 순서에 의존해 서는 안 됩니다.Items in a ListDictionary are not in any guaranteed order; code should not depend on the current order. ListDictionary는 빠른 키 검색을 위해 구현 됩니다. 항목의 실제 내부 순서는 구현에 따라 다르며 이후 버전의 제품에서 변경 될 수 있습니다.The ListDictionary is implemented for fast keyed retrieval; the actual internal order of items is implementation-dependent and could change in future versions of the product.

Item[Object], Add, Remove, Contains 등의 멤버는 O (n) 작업으로, n Count됩니다.Members, such as Item[Object], Add, Remove, and Contains are O(n) operations, where n is Count.

키는 null수 없지만 값은 사용할 수 있습니다.A key cannot be null, but a value can.

C# 언어의 foreach 문 (Visual Basic의for each)은 컬렉션의 요소 형식에 대 한 개체를 반환 합니다.The foreach statement of the C# language (for each in Visual Basic) returns an object of the type of the elements in the collection. ListDictionary의 각 요소는 키/값 쌍 이므로 요소 형식은 키의 형식이 나 값의 형식이 아닙니다.Since each element of the ListDictionary is a key/value pair, the element type is not the type of the key or the type of the value. 대신 요소 형식이 DictionaryEntry됩니다.Instead, the element type is DictionaryEntry. 예를 들면 다음과 같습니다.For example:

for each (DictionaryEntry de in myListDictionary)
{
    //...
}
foreach (DictionaryEntry de in myListDictionary)
{
    //...
}
For Each de As DictionaryEntry In myListDictionary
    '...
Next de

foreach 문은 컬렉션에 쓰지 않고 읽을 수 있는 열거자에 대 한 래퍼입니다.The foreach statement is a wrapper around the enumerator, which only allows reading from, not writing to, the collection.

생성자

ListDictionary()

기본 비교자를 사용하여 빈 ListDictionary를 만듭니다.Creates an empty ListDictionary using the default comparer.

ListDictionary(IComparer)

지정된 비교자를 사용하여 빈 ListDictionary를 만듭니다.Creates an empty ListDictionary using the specified comparer.

속성

Count

ListDictionary에 포함된 키/값 쌍의 수를 가져옵니다.Gets the number of key/value pairs contained in the ListDictionary.

IsFixedSize

ListDictionary의 크기가 고정되어 있는지 여부를 나타내는 값을 가져옵니다.Gets a value indicating whether the ListDictionary has a fixed size.

IsReadOnly

ListDictionary이 읽기 전용인지를 표시하는 값을 가져옵니다.Gets a value indicating whether the ListDictionary is read-only.

IsSynchronized

ListDictionary가 동기화되어 스레드로부터 안전하게 보호되는지 여부를 나타내는 값을 가져옵니다.Gets a value indicating whether the ListDictionary is synchronized (thread safe).

Item[Object]

지정된 키와 연결된 값을 가져오거나 설정합니다.Gets or sets the value associated with the specified key.

Keys

ICollection의 키를 포함하는 ListDictionary을 가져옵니다.Gets an ICollection containing the keys in the ListDictionary.

SyncRoot

ListDictionary에 대한 액세스를 동기화하는 데 사용할 수 있는 개체를 가져옵니다.Gets an object that can be used to synchronize access to the ListDictionary.

Values

ICollection의 값이 들어 있는 ListDictionary을 가져옵니다.Gets an ICollection containing the values in the ListDictionary.

메서드

Add(Object, Object)

지정한 키와 값을 가지는 엔트리를 ListDictionary에 추가합니다.Adds an entry with the specified key and value into the ListDictionary.

Clear()

ListDictionary에서 모든 엔트리를 제거합니다.Removes all entries from the ListDictionary.

Contains(Object)

ListDictionary에 특정 키가 들어 있는지 여부를 확인합니다.Determines whether the ListDictionary contains a specific key.

CopyTo(Array, Int32)

지정한 인덱스에서 ListDictionary 엔트리를 1차원 Array 인스턴스에 복사합니다.Copies the ListDictionary entries to a one-dimensional Array instance at the specified index.

Equals(Object)

지정한 개체가 현재 개체와 같은지를 확인합니다.Determines whether the specified object is equal to the current object.

(다음에서 상속됨 Object)
GetEnumerator()

IDictionaryEnumerator를 반복하는 ListDictionary를 반환합니다.Returns an IDictionaryEnumerator that iterates through the ListDictionary.

GetHashCode()

기본 해시 함수로 작동합니다.Serves as the default hash function.

(다음에서 상속됨 Object)
GetType()

현재 인스턴스의 Type을 가져옵니다.Gets the Type of the current instance.

(다음에서 상속됨 Object)
MemberwiseClone()

현재 Object의 단순 복사본을 만듭니다.Creates a shallow copy of the current Object.

(다음에서 상속됨 Object)
Remove(Object)

ListDictionary에서 지정한 키를 가지는 엔트리를 제거합니다.Removes the entry with the specified key from the ListDictionary.

ToString()

현재 개체를 나타내는 string을 반환합니다.Returns a string that represents the current object.

(다음에서 상속됨 Object)

명시적 인터페이스 구현

IEnumerable.GetEnumerator()

IEnumerator를 반복하는 ListDictionary를 반환합니다.Returns an IEnumerator that iterates through the ListDictionary.

확장 메서드

Cast<TResult>(IEnumerable)

IEnumerable의 요소를 지정된 형식으로 캐스팅합니다.Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable)

지정된 형식에 따라 IEnumerable의 요소를 필터링합니다.Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable)

쿼리를 병렬화할 수 있도록 합니다.Enables parallelization of a query.

AsQueryable(IEnumerable)

IEnumerableIQueryable로 변환합니다.Converts an IEnumerable to an IQueryable.

적용 대상

스레드 보안

공용 정적 (Shared Visual Basic의)이 형식의 멤버는 스레드로부터 안전 합니다.Public static (Shared in Visual Basic) members of this type are thread safe. 인스턴스 멤버는 스레드로부터의 안전이 보장되지 않습니다.Any instance members are not guaranteed to be thread safe.

이 구현에서는 ListDictionary에 대해 동기화 되어 스레드로부터 안전 하 게 보호 되는 래퍼를 제공 하지 않지만 파생 클래스는 SyncRoot 속성을 사용 하 여 ListDictionary의 동기화 된 버전을 만들 수 있습니다.This implementation does not provide a synchronized (thread safe) wrapper for a ListDictionary, but derived classes can create their own synchronized versions of the ListDictionary using the SyncRoot property.

컬렉션 전체를 열거하는 프로시저는 기본적으로 스레드로부터 안전하지 않습니다.Enumerating through a collection is intrinsically not a thread-safe procedure. 컬렉션이 동기화되어 있을 때 다른 스레드에서 해당 컬렉션을 수정할 수 있으므로 이렇게 되면 열거자에서 예외가 throw됩니다.Even when a collection is synchronized, other threads can still modify the collection, which causes the enumerator to throw an exception. 열거하는 동안 스레드로부터 안전을 보장하려면 전체 열거를 수행하는 동안 컬렉션을 잠그거나 다른 스레드에서 변경된 내용으로 인해 발생한 예외를 catch하면 됩니다.To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.

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