[.NET] Make DriverService InitializationTimeout property public

Also allow the property to be settable. Fixes issue #9150.

dotnet/CHANGELOG

@@ -6,6 +6,8 @@ v4.0.0b2
    Nightly. To use this feature, set the EnableDevToolsProtocol property of
    FirefoxOptions to true.
  * Fixed network interception for use with browsers that support CDP.
+ * Made DriverService.InitializationTimeout a public settable property. Fixes
+   issue #9150.
 
 v4.0.0b1
 ========

dotnet/src/webdriver/DriverService.cs

@@ -40,6 +40,7 @@ public abstract class DriverService : ICommandServer
         private bool hideCommandPromptWindow;
         private bool isDisposed;
         private Process driverServiceProcess;
+        private TimeSpan initializationTimeout = TimeSpan.FromSeconds(20);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="DriverService"/> class.
@@ -166,6 +167,15 @@ public int ProcessId
             }
         }
 
+        /// <summary>
+        /// Gets or sets a value indicating the time to wait for an initial connection before timing out.
+        /// </summary>
+        public TimeSpan InitializationTimeout
+        {
+            get { return this.initializationTimeout; }
+            set { this.initializationTimeout = value; }
+        }
+
         /// <summary>
         /// Gets the executable file name of the driver service.
         /// </summary>
@@ -182,14 +192,6 @@ protected virtual string CommandLineArguments
             get { return string.Format(CultureInfo.InvariantCulture, "--port={0}", this.driverServicePort); }
         }
 
-        /// <summary>
-        /// Gets a value indicating the time to wait for an initial connection before timing out.
-        /// </summary>
-        protected virtual TimeSpan InitializationTimeout
-        {
-            get { return TimeSpan.FromSeconds(20); }
-        }
-
         /// <summary>
         /// Gets a value indicating the time to wait for the service to terminate before forcing it to terminate.
         /// </summary>

dotnet/src/webdriver/Firefox/FirefoxDriverService.cs

@@ -124,14 +124,6 @@ public FirefoxDriverLogLevel LogLevel
             set { this.loggingLevel = value; }
         }
 
-        /// <summary>
-        /// Gets a value indicating the time to wait for an initial connection before timing out.
-        /// </summary>
-        protected override TimeSpan InitializationTimeout
-        {
-            get { return TimeSpan.FromSeconds(2); }
-        }
-
         /// <summary>
         /// Gets a value indicating the time to wait for the service to terminate before forcing it to terminate.
         /// </summary>