silverlight - annoying behavior in binding property in control to another one -


i have 2 radio buttons n xaml this:

                <radiobutton x:name="radio1"                          margin="12,46,30,0"                          horizontalalignment="left"                          verticalalignment="top"                          content="radio1"                          groupname="group1"                          ischecked="true" />              <radiobutton x:name="radio2"                          margin="12,46,0,0"                          horizontalalignment="left"                          verticalalignment="top"                          content="radio2"                          groupname="group1"                          ischecked="false" />

i want display different grid each radio button checking bind grid visibility radiobutton ischecked property this:

            <grid name="grid1"               grid.row="1"               visibility="{binding ischecked,                                     converter={staticresource visibilityconverter},                                    elementname=radio1}">               <grid name="grid2"               grid.row="1"               margin="0,50,0,0"               visibility="{binding ischecked,                                    converter={staticresource visibilityconverter},                                    elementname=radio2}">

it works have problem. first time load page 2 grids appear apart of second non checked 1 disappear. seems visibility of grid set default value change after drawing according binding. there solution or workaround?

note: solution windows phone 8 solution


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