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.NET 6.0+

BaseObjectSpace.FirstOrDefault<ObjectType>(Expression<Func<ObjectType, Boolean>>, Boolean) Method

Searches for the first object that matches the specified lambda expression. The generic parameter determines the object’s type. This method takes uncommitted changes into account.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v23.2.dll

NuGet Package: DevExpress.ExpressApp


public virtual ObjectType FirstOrDefault<ObjectType>(
    Expression<Func<ObjectType, bool>> criteriaExpression,
    bool inTransaction
    where ObjectType : class


Name Type Description
criteriaExpression Expression<Func<ObjectType, Boolean>>

A lambda expression to search for an object.

inTransaction Boolean

true if the method takes unsaved changes into account; otherwise, false.

Type Parameters

Name Description

The Type of an object to be returned.


Type Description

The first object that matches the specified lambda expression.


This method does nothing and returns null (Nothing in VB), override it in BaseObjectSpace descendants.

See Also