<Button x:Name="MTWater"
Style="{StaticResource MenuItem}"
Content="Map Tip Water">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<esriBehaviors:ToggleLayerAction LayerID="FLWaterLines" TargetName="MyMap"/>
</i:EventTrigger>
<!--<i:EventTrigger>
<esriBehaviors:UpdateFeatureLayerAction FeatureLayerID="FLWaterLines" TargetName="MyMap"/>
</i:EventTrigger>-->
</i:Interaction.Triggers>
</Button><esri:FeatureLayer ID="FLWaterLines" Url="http://***/rest/services/GIS_App_ENG/MapServer/2"
FeatureSymbol="{StaticResource LineWaterBlue}" Mode="OnDemand" OutFields="*" MaximumResolution="3"
Visible="False" x:Name="FLWL" Where="WATERLINETYPE='WATERMAIN'"><Button x:Name="MTWater"
Style="{StaticResource MenuItem}"
Content="Map Tip Water">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<esriBehaviors:ToggleLayerAction LayerID="FLWaterLines" TargetName="MyMap"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>