IsDarkpool Property (#35)

* add property IsDarkpool

* version bump

IntrinioRealTimeClient.nuspec

@@ -2,15 +2,15 @@
 <package>
 	<metadata>
 		<id>IntrinioRealTimeClient</id>
-		<version>9.1.1</version>
+		<version>9.2.0</version>
 		<title>Intrinio SDK for Real-Time Stock Prices</title>
 		<authors>Intrinio</authors>
 		<owners>Intrinio</owners>
 		<requireLicenseAcceptance>false</requireLicenseAcceptance>
 		<licenseUrl>https://licenses.nuget.org/MIT</licenseUrl>
 		<projectUrl>https://github.com/intrinio/intrinio-realtime-csharp-sdk</projectUrl>
 		<description>Intrinio provides real-time stock prices via a two-way WebSocket connection.</description>
-		<releaseNotes>Version 9.1.1 release.</releaseNotes>
+		<releaseNotes>Version 9.2.0 release.</releaseNotes>
 		<copyright>Copyright 2024 Intrinio</copyright>
 		<tags>fintech stocks prices websocket real-time market finance</tags>
 		<dependencies>

IntrinioRealtimeMultiExchange/Client.fs

@@ -62,7 +62,7 @@ type Client(
     let useOnQuote : bool = not (obj.ReferenceEquals(onQuote,null))
     let logPrefix : string = String.Format("{0}: ", config.Provider.ToString())
     let clientInfoHeaderKey : string = "Client-Information"
-    let clientInfoHeaderValue : string = "IntrinioDotNetSDKv9.1"
+    let clientInfoHeaderValue : string = "IntrinioDotNetSDKv9.2"
     let messageVersionHeaderKey : string = "UseNewEquitiesFormat"
     let messageVersionHeaderValue : string = "v2"
     let mainThreadPriority = Thread.CurrentThread.Priority //this is set outside of our scope - let's not interfere.

IntrinioRealtimeMultiExchange/Types.fs

@@ -93,6 +93,9 @@ type [<Struct>] Trade =
         MarketCenter: char
         Condition: string
     }
+
+    member this.IsDarkpool() : bool =
+        this.MarketCenter.Equals((char)0) || this.MarketCenter.Equals('D') || this.MarketCenter.Equals('E') || Char.IsWhiteSpace(this.MarketCenter)
 
     override this.ToString() : string =
         "Trade (" +