SortedSet<T>.RemoveWhere Method (Predicate<T>)

.NET Framework (current version)

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Removes all elements that match the conditions defined by the specified predicate from a SortedSet<T>.

Namespace:   System.Collections.Generic
Assembly:  System (in System.dll)

public int RemoveWhere(
	Predicate<T> match


Type: System.Predicate<T>

The delegate that defines the conditions of the elements to remove.

Return Value

Type: System.Int32

The number of elements that were removed from the SortedSet<T> collection..

Exception Condition

match is null.

match must not modify the SortedSet<T>. Doing so can cause unexpected results.

Calling this method is an O(n) operation, where n is Count.

The following example removes unwanted elements from a sorted set. This code example is part of a larger example provided for the SortedSet<T> class.

// Remove elements that have non-media extensions.
// See the 'isDoc' method.
Console.WriteLine("Remove docs from the set...");
Console.WriteLine("\tCount before: {0}", mediaFiles1.Count.ToString());
Console.WriteLine("\tCount after: {0}", mediaFiles1.Count.ToString());
// Defines a predicate delegate to use
// for the SortedSet.RemoveWhere method.
private static bool isDoc(string s)
    if (s.ToLower().EndsWith(".txt") ||
        s.ToLower().EndsWith(".doc") ||
        s.ToLower().EndsWith(".xls") ||
        s.ToLower().EndsWith(".xlsx") ||
        s.ToLower().EndsWith(".pdf") ||
        s.ToLower().EndsWith(".doc") ||
        return true;
        return false;

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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