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‎docs/framework/additional-apis/pos-for-net/linedisplay-sample.md

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@@ -41,125 +41,126 @@ Set capability properties in your Service Object to advertise support for the fe
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## Example
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using System;
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using System.Collections.Generic;
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using System.Text;
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using Microsoft.PointOfService;
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using Microsoft.PointOfService.BaseServiceObjects;
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[assembly: PosAssembly("Service Object Contractors, Inc.")]
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namespace SOSample.LineDisplay
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```csharp
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using System;
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using System.Collections.Generic;
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using System.Text;
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using Microsoft.PointOfService;
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using Microsoft.PointOfService.BaseServiceObjects;
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[assembly: PosAssembly("Service Object Contractors, Inc.")]
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namespace SOSample.LineDisplay
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{
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[ServiceObject(
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DeviceType.LineDisplay,
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"SampleLineDisplay",
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"Sample LineDiplay Service Object",
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1,
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9)]
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public class SampleLineDisplay : LineDisplayBase
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{
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[ServiceObject(
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DeviceType.LineDisplay,
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"SampleLineDisplay",
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"Sample LineDiplay Service Object",
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1,
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9)]
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public class SampleLineDisplay : LineDisplayBase
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SampleLineDisplay()
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{
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SampleLineDisplay()
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{
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// The CapBlink property is initially set to
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// DisplayBlink.None in LineDisplayBase. This property
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// will be set here to indicate what mode of blinking
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// text our Service Object can support.
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Properties.CapBlink = DisplayBlink.All;
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// Set the CapBlinkRate property to true to indicate
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// that this device has the ability to change the
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// rate at which it blinks by setting the property
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// BlinkRate.
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Properties.CapBlinkRate = true;
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}
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// The CapBlink property is initially set to
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// DisplayBlink.None in LineDisplayBase. This property
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// will be set here to indicate what mode of blinking
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// text our Service Object can support.
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Properties.CapBlink = DisplayBlink.All;
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// Set the CapBlinkRate property to true to indicate
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// that this device has the ability to change the
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// rate at which it blinks by setting the property
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// BlinkRate.
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Properties.CapBlinkRate = true;
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}
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#region Implement Abstract LineDisplayBase Members
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// LineDisplayScreenMode must be implemented to
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// allow the application to find out which screen modes
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// are supported by this device.
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protected override LineDisplayScreenMode[]
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LineDisplayScreenModes
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#region Implement Abstract LineDisplayBase Members
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// LineDisplayScreenMode must be implemented to
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// allow the application to find out which screen modes
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// are supported by this device.
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protected override LineDisplayScreenMode[]
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LineDisplayScreenModes
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{
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get
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{
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get
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{
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LineDisplayScreenMode[] SupportedModes;
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// Create a LineDisplayScreenMode object; this SO
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// has a screen mode 10 columns wide and 2 rows deep.
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LineDisplayScreenMode mode =
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new LineDisplayScreenMode(10, 2, 0, 0);
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// Allocate space for our screen mode array and
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// initialize it to hold our supported screen
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// mode(s).
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SupportedModes =
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new LineDisplayScreenMode[] { mode };
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return SupportedModes;
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}
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}
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LineDisplayScreenMode[] SupportedModes;
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// DisplayData is the method called from the application
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// specifying what data should be displayed on the
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// device.
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protected override void DisplayData(Cell[] cells)
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{
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// Your code here:
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// Send the data to your device. Take settings such
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// as blink and blink rate into account here.
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return;
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}
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#endregion Implement Abstract LineDisplayBase Members
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// Create a LineDisplayScreenMode object; this SO
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// has a screen mode 10 columns wide and 2 rows deep.
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LineDisplayScreenMode mode =
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new LineDisplayScreenMode(10, 2, 0, 0);
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#region Implement Abstract PosCommon Members
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private string MyHealthText = "";
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// Allocate space for our screen mode array and
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// initialize it to hold our supported screen
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// mode(s).
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SupportedModes =
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new LineDisplayScreenMode[] { mode };
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// PosCommon.CheckHealthText.
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public override string CheckHealthText
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{
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get
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{
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// VerifyState(mustBeClaimed,
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// mustBeEnabled).
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VerifyState(false, false);
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return MyHealthText;
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}
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return SupportedModes;
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}
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}
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// PosCommon.CheckHealth.
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public override string CheckHealth(
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HealthCheckLevel level)
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{
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// Verify that the device is open, claimed and enabled.
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VerifyState(true, true);
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// DisplayData is the method called from the application
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// specifying what data should be displayed on the
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// device.
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protected override void DisplayData(Cell[] cells)
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{
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// Your code here:
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// Send the data to your device. Take settings such
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// as blink and blink rate into account here.
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return;
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}
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#endregion Implement Abstract LineDisplayBase Members
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// Your code here:
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// check the health of the device and return a
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// descriptive string.
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#region Implement Abstract PosCommon Members
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private string MyHealthText = "";
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// Cache result in the CheckHealthText property.
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MyHealthText = "Ok";
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// PosCommon.CheckHealthText.
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public override string CheckHealthText
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{
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get
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{
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// VerifyState(mustBeClaimed,
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// mustBeEnabled).
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VerifyState(false, false);
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return MyHealthText;
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}
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}
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// PosCommon.DirectIOData.
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public override DirectIOData DirectIO(
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int command,
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int data,
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object obj)
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{
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// Verify that the device is open.
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VerifyState(false, false);
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// PosCommon.CheckHealth.
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public override string CheckHealth(
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HealthCheckLevel level)
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{
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// Verify that the device is open, claimed and enabled.
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VerifyState(true, true);
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return new DirectIOData(data, obj);
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}
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#endregion Abstract PosCommon Members
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// Your code here:
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// check the health of the device and return a
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// descriptive string.
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// Cache result in the CheckHealthText property.
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MyHealthText = "Ok";
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return MyHealthText;
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}
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}
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// PosCommon.DirectIOData.
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public override DirectIOData DirectIO(
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int command,
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int data,
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object obj)
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{
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// Verify that the device is open.
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VerifyState(false, false);
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return new DirectIOData(data, obj);
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}
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#endregion Abstract PosCommon Members
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}
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}
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```
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## See Also
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#### Other Resources

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