Solution for adding a button

SessionInfo.xaml

<Button>
    <Button.Template>
        <ControlTemplate>
            <Control Style="{DynamicResource SideUserImageStyle}" Tag="{Binding Path=User.Image}" />
        </ControlTemplate>
    </Button.Template>
</Button>

SessionInfoCursor.xaml

<Button Cursor="Hand">
    <Button.Template>
        <ControlTemplate>
            <Control Style="{DynamicResource SideUserImageStyle}" Tag="{Binding Path=User.Image}" />
        </ControlTemplate>
    </Button.Template>
</Button>

SessionInfoCursorHook.xaml

<Button Cursor="Hand" x:Name="ShowUserProfile">
    <Button.Template>
        <ControlTemplate>
            <Control Style="{DynamicResource SideUserImageStyle}" Tag="{Binding Path=User.Image}" />
        </ControlTemplate>
    </Button.Template>
</Button>

SessionInfoViewModel.cs

public void ShowUserProfile() {
 WorkspaceConductor.ActivateItem(ProfileWorkspace);
}

SessionInfoViewModelTest.cs

workspaceConductor.Verify(mock => mock.ActivateItem(profileWorkspace.Object), Times.Once);