Powershell -file doesn't handle arguments that are string[]

project/core/tasks/PowerShellTask.cs

@@ -209,6 +209,16 @@ public string SuccessExitCodes
         [ReflectorProperty("buildTimeoutSeconds", Required = false)]
         public int BuildTimeoutSeconds { get; set; }
 
+        /// <summary>
+        /// CCnet 1.8 always uses -File for execution, this means that if you want to pass an array
+        /// of strings as an argument it screws it up, I'm adding the ability to use -Command which
+        /// will behave as the user expects, however this will optional for backwards compatibility
+        /// </summary>
+        /// <version>1.8</version>
+        /// <default>false</default>
+        [ReflectorProperty("useCommandExecution", Required = false)]
+        public bool UseCommandExecution { get; set; }
+
         /// <summary>
         /// Run the specified PowerShell and add its output to the build results.
         /// </summary>
@@ -395,7 +405,7 @@ private string Args(IIntegrationResult result)
             builder.AppendArgument("-NoProfile");
             builder.AppendArgument("-NonInteractive");
 
-            builder.AppendArgument("-file");
+            builder.AppendArgument(UseCommandExecution ? "-command" : "-file");
 
             if (!string.IsNullOrEmpty(Script))
             {