Implements a hash table with the key and the value strongly typed to be strings rather than objects.
Assembly: System (in System.dll)
Thetype exposes the following members.
|Count||Gets the number of key/value pairs in the .|
|IsSynchronized||Gets a value indicating whether access to the is synchronized (thread safe).|
|Item||Gets or sets the value associated with the specified key.|
|Keys||Gets a collection of keys in the .|
|SyncRoot||Gets an object that can be used to synchronize access to the .|
|Values||Gets a collection of values in the .|
|Add||Adds an entry with the specified key and value into the .|
|Clear||Removes all entries from the .|
|ContainsKey||Determines if the contains a specific key.|
|ContainsValue||Determines if the contains a specific value.|
|CopyTo||Copies the string dictionary values to a one-dimensional Array instance at the specified index.|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|Finalize||Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)|
|GetEnumerator||Returns an enumerator that iterates through the string dictionary.|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|Remove||Removes the entry with the specified key from the string dictionary.|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
|AsParallel||Enables parallelization of a query. (Defined by ParallelEnumerable.)|
|AsQueryable||Converts an IEnumerable to an IQueryable. (Defined by Queryable.)|
|Cast(TResult)||Casts the elements of an IEnumerable to the specified type. (Defined by Enumerable.)|
|OfType(TResult)||Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.)|
A key cannot be a null reference (Nothing in Visual Basic), but a value can.
The key is handled in a case-insensitive manner; it is translated to lowercase before it is used with the string dictionary.
In .NET Framework version 1.0, this class uses culture-sensitive string comparisons. However, in .NET Framework version 1.1 and later, this class uses CultureInfo.InvariantCulture when comparing strings. For more information about how culture affects comparisons and sorting, see Comparing and Sorting Data for a Specific Culture and Performing Culture-Insensitive String Operations.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
This implementation does not provide a synchronized (thread safe) wrapper for a , but derived classes can create their own synchronized versions of the using the SyncRoot property.
Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads can still modify the collection, which causes the enumerator to throw an exception. 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.