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Collection<T>.RemoveAll(Predicate<T>) Method

Removes all items that match the conditions defined by the specified predicate from the collection.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v22.2.dll

NuGet Package: DevExpress.Web


public void RemoveAll(
    Predicate<T> match


Name Type Description
match Predicate<T>

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


The RemoveAll method individually passes elements of the current collection to a predicate, and removes elements that match the predicate. A predicate is a delegate to a method that returns true if the object passed to it matches the conditions defined in the delegate; otherwise the method returns false.


The code sample below demonstrates how you can use the RemoveAll method to remove items from a collection based on custom conditions. In this example, any CloudControlItem, whose value is less then the value specified via the ASPxSpinEdit, is removed on a button click.

using DevExpress.Web.ASPxCloudControl;
protected void btn_RemoveItems_Click(object sender, EventArgs e) {
public bool IsLess(CloudControlItem Item) {
     var MinValue = ASPxSpinEdit1.Number;
     return (decimal)Item.Value < MinValue;
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