Syntax
| Visual Basic (Declaration) | |
|---|---|
Public Overloads Function TryRemove( _ ByVal key As TKey, _ ByRef value As TValue _ ) As Boolean | |
Parameters
- key
- The key of the element to remove.
- value
- The value that was removed.
Return Value
true if the element is successfully removed; otherwise, false. This method also returns false if key was not found in the original IDictionary.Exceptions
| Exception | Description |
|---|---|
| System.NotSupportedException | The IDictionary is read-only. |
Example
Library/Library.Test/TestSynchronizedCollections.cs
| C# |  Copy Code |
|---|---|
SynchronizedDictionary<int, string> data = new SynchronizedDictionary<int, string>(new Dictionary<int, string>()); Assert.IsTrue(data.TryAdd(1, "a")); Assert.IsFalse(data.TryAdd(1, "a")); Assert.IsTrue(data.TryUpdate(1, "a")); Assert.IsTrue(data.TryUpdate(1, "c")); Assert.IsTrue(data.TryUpdate(1, "d", "c")); Assert.IsFalse(data.TryUpdate(1, "f", "c")); Assert.AreEqual("d", data[1]); Assert.IsTrue(data.TryUpdate(1, "a", data[1])); Assert.AreEqual("a", data[1]); Assert.IsFalse(data.TryUpdate(2, "b")); string val; Assert.IsTrue(data.TryRemove(1, out val) && val == "a"); Assert.IsFalse(data.TryRemove(2, out val)); Assert.AreNotEqual(val, "a"); Assert.IsFalse(data.TryUpdate(1, (k, x) => x.ToUpper())); data[1] = "a"; data[1] = "b"; Assert.IsTrue(data.TryUpdate(1, (k, x) => x.ToUpper())); Assert.AreEqual("B", data[1]); | |
| VB.NET | Copy Code |
|---|---|
Dim data As New SynchronizedDictionary(Of Integer, String)(New Dictionary(Of Integer, String)()) Assert.IsTrue(data.TryAdd(1, "a")) Assert.IsFalse(data.TryAdd(1, "a")) Assert.IsTrue(data.TryUpdate(1, "a")) Assert.IsTrue(data.TryUpdate(1, "c")) Assert.IsTrue(data.TryUpdate(1, "d", "c")) Assert.IsFalse(data.TryUpdate(1, "f", "c")) Assert.AreEqual("d", data(1)) Assert.IsTrue(data.TryUpdate(1, "a", data(1))) Assert.AreEqual("a", data(1)) Assert.IsFalse(data.TryUpdate(2, "b")) Dim val As String Assert.IsTrue(data.TryRemove(1, val) AndAlso val = "a") Assert.IsFalse(data.TryRemove(2, val)) Assert.AreNotEqual(val, "a") Assert.IsFalse(data.TryUpdate(1, Function(k, x) x.ToUpper())) data(1) = "a" data(1) = "b" Assert.IsTrue(data.TryUpdate(1, Function(k, x) x.ToUpper())) Assert.AreEqual("B", data(1)) | |
Requirements
Target Platforms: Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7