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RequiredAttribute Constructor

Initializes a new instance of the RequiredAttribute class.

Namespace:  System.ComponentModel.DataAnnotations
Assembly:  System.ComponentModel.DataAnnotations (in System.ComponentModel.DataAnnotations.dll)

public RequiredAttribute()

The following example shows how to use the RequiredAttribute constructor. If validation fails, the example displays a validation error message that is provided by Dynamic Data.

// Require that the MiddleName is not null.
// Use standard validation error.
public object MiddleName;

.NET Framework

Supported in: 4, 3.5 SP1

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.