Xaml and view model for validation

SampleXaml.xaml

<Grid>
	<Grid.ColumnDefinitions>
		<ColumnDefinition />
		<ColumnDefinition />
		<ColumnDefinition />
	</Grid.ColumnDefinitions>

	<TextBlock Grid.Row="0" Style="{StaticResource FormLabelStyle}" Text="Name"/>                

	<TextBox Grid.Row="0" Grid.Column="1" Text="{Binding Name, Mode=TwoWay}" common:Validation.Property="Name" common:Validation.ValidationPlaceholder="{Binding ElementName=NameValidation}" common:Validation.DataContext="{Binding}" />

	<View:ValidationResultPlaceholder Grid.Row="0" x:Name="NameValidation"  Grid.Column="2" />                
</Grid>    

ViewModel.cs

using System;
using System.ComponentModel.DataAnnotations;

internal class SampleViewModel : ViewModel
{        
	public SampleViewModel()
	{
		ValidateObject();
	}

	[Required]
	[StringLength(250)]
	public string Name
	{
		get
		{
			return name;
		}
		set
		{
			SetPropertyAndValidate(() => name, x => name = x, value);
		}
	}

	[Required]
	[StringLength(250)]
	public string Address
	{
		get
		{
			return address;
		}
		set
		{
			SetPropertyAndValidate(() => address, x => address = x, value);
		}
	}        
}