Unable to view the custom property in the WPF mind scape property grid.

 I have used the below code to register the custom  property.

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public static readonly DependencyProperty IsRequiredProperty= DependencyProperty.RegisterAttached(
                          "IsMandatory",                  //Name of the property
                          typeof(string),             //Type of the property
                          typeof(ExtProperties),   //Type of the provider of the registered attached property
                          null);   

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And I have created the get; set methods to it.

=================
 [Category(@"Mandatory Field Validations")]
          [DisplayName("Is Mandatory")]
          public static void SetSetasMandatory(DependencyObject obj, string tabStop)
          {
              obj.SetValue(IsRequiredProperty, tabStop);
          }

                    [Category(@"Mandatory Field Validations")]
          [DisplayName("Is Mandatory")]
          public static string GetSetasMandatory(DependencyObject obj)
          {
              return (string)obj.GetValue(IsRequiredProperty);
          }
========================================= 

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I have added the a DataTemplate and property Editor  in the xaml file

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<DataTemplate x:Key="cmbIsRequiredTemplate">
                <TextBox  Text="{Binding value}" KeyDown="cmbIsMandatory_KeyDown" Loaded="cmbIsMandatory_Loaded"
                          Name="txtExtTooltip" MaxLength="50" TextBoxBase.TextChanged="cmbIsMandatory_TextChanged"   />
            </DataTemplate>

 <ms:PropertyEditor PropertyName="ExtProperties.IsRequired" EditorTemplate="{StaticResource cmbIsRequiredTemplate}"/> 

================================= 

I have set an Intial value to it.

=============

 txt.SetValue(ExtProperties.IsRequiredProperty, string.Empty); 

============

I have filtere  property to filter the properties ; using the below code

=============

 TextProperties.Add("ExtProperties.SetSetasMandatoryProperties");

I am unable to view the custom property in my property grid using the above code.

=====================

This occurs because your DependencyProperty declaration is incorrect.  You must use the same name for the accessor methods and the DP name.  You have used “{Get|Set}SetasMandatory” for the accessor methods and “IsMandatory” for the DP name (you also use “IsRequired” for the property object field name, which is a bit confusing though it doesn’t appear to cause a problem).

Your filter also looks wrong: I suspect "ExtProperties.SetSetasMandatoryProperties" should be "ExtProperties.IsMandatory" (i.e. use the property name, not the setter method name with “Properties” stuck on the end).

Finally your property editor declaration uses the DP object field name, not the property name.  It should be <ms:PropertyEditor PropertyName="ExtProperties.IsMandatory" />.

Change your accessor methods to be named GetIsMandatory and SetIsMandatory, fix up the names in the filter and editor declaration, and you should be good to go.