Fix exceptions thrown when PowerShell script writes to host.

src/AddIns/Misc/PackageManagement/Project/Src/Scripting/PowerShellHostRawUserInterface.cs

@@ -12,6 +12,7 @@ namespace ICSharpCode.PackageManagement.Scripting
 		IScriptingConsole scriptingConsole;
 		
 		public const int MinimumColumns = 80;
+		public static readonly ConsoleColor NoConsoleColor = (ConsoleColor)(-1);
 		
 		public PowerShellHostRawUserInterface(IScriptingConsole scriptingConsole)
 		{
@@ -85,8 +86,8 @@ namespace ICSharpCode.PackageManagement.Scripting
 		}
 		
 		public override ConsoleColor ForegroundColor {
-			get { throw new NotImplementedException(); }
+			get { return NoConsoleColor; }
-			set { throw new NotImplementedException(); }
+			set { }
 		}
 		
 		public override void FlushInputBuffer()
@@ -105,8 +106,8 @@ namespace ICSharpCode.PackageManagement.Scripting
 		}
 		
 		public override ConsoleColor BackgroundColor {
-			get { throw new NotImplementedException(); }
+			get { return NoConsoleColor; }
-			set { throw new NotImplementedException(); }
+			set { }
 		}
 	}
 }

src/AddIns/Misc/PackageManagement/Test/Src/Scripting/PowerShellHostUserInterfaceTests.cs

@@ -190,5 +190,39 @@ namespace PackageManagement.Tests.Scripting
 			
 			Assert.AreEqual(expectedSize, actualSize);
 		}
+		
+		[Test]
+		public void RawUIForegroundColor_SetForegroundColor_DoesNotThrowException()
+		{
+			CreateHostUserInterface();
+			Assert.DoesNotThrow(() => hostUI.RawUI.ForegroundColor = ConsoleColor.Black);
+		}
+		
+		[Test]
+		public void RawUIForegroundColor_GetForegroundColor_ReturnsNoConsoleColor()
+		{
+			CreateHostUserInterface();
+			ConsoleColor color = hostUI.RawUI.ForegroundColor;
+			ConsoleColor expectedColor = PowerShellHostRawUserInterface.NoConsoleColor;
+			
+			Assert.AreEqual(expectedColor, color);
+		}
+		
+		[Test]
+		public void RawUIForegroundColor_SetBackgroundColor_DoesNotThrowException()
+		{
+			CreateHostUserInterface();
+			Assert.DoesNotThrow(() => hostUI.RawUI.BackgroundColor = ConsoleColor.Black);
+		}
+		
+		[Test]
+		public void RawUIForegroundColor_GetBackgroundColor_ReturnsNoColor()
+		{
+			CreateHostUserInterface();
+			ConsoleColor color = hostUI.RawUI.BackgroundColor;
+			ConsoleColor expectedColor = PowerShellHostRawUserInterface.NoConsoleColor;
+			
+			Assert.AreEqual(expectedColor, color);
+		}
 	}
 }