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I am making a windows phone 8 application, where i use LongListSelector and DatePicker.
the LongListSelector is from windows.controls
the DatePicker is from (Date Picker is not-available in Windows.Controls).

** As soon as i Drag and drop DatePicker in my design it is adding to references and in XAML file.
and now while building the file its saying Error 1 The type 'Microsoft.Phone.Controls.LongListSelector' exists in both 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\WindowsPhone\v8.0\Microsoft.Phone.dll' and 'C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.1\Toolkit\Aug11\Bin\'
** I don't need to work with my LongListSelector (as it LLS is from

i want to use the controls in windows.controls.. how can i achieve this.
Updated 8-Jun-15 22:23pm
Naz_Firdouse 9-Jun-15 3:52am    
How are you referencing LongListSelector in XAML...
share sample code
Aditya_Goud 9-Jun-15 4:27am    
@naz_Firdouse i am not referencing LLS .. because it is inherited from Windows.Controls.
Sergey Alexandrovich Kryukov 9-Jun-15 4:11am    
You have to either remove one of the references, or resolve the ambiguity.
Aditya_Goud 9-Jun-15 4:31am    
yes .. if i remove the reference LLS it works perfect .. But i cant use Date-picker ! beacuse its not listed in Windows.controls

1 solution

Working method
Delete the existing in references..
Right click on references.. Select Manage NuGet Packages
Go online and search for windows phone toolkit.. and install it,
then add
in your xaml file on the top.

then type
<toolKit:you will get it 

Dont Follow this method
** Don't search for your control in toolbox and drop in UI .. it will cause same error , it will generate a .dll under references
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