Imported Upstream version 5.14.0.78

Former-commit-id: 3494343bcc9ddb42b36b82dd9ae7b69e85e0229f

mcs/class/corlib/System/Array.cs

@@ -49,7 +49,6 @@ namespace System
 		private Array ()
 		{
 		}
-
 		/*
 		 * These methods are used to implement the implicit generic interfaces 
 		 * implemented by arrays in NET 2.0.

mcs/class/corlib/System/Console.cs

@@ -596,7 +596,6 @@ namespace System
 			get { return ConsoleDriver.LargestWindowWidth; }
 		}
 
-		[MonoLimitation ("Only works on windows")]
 		public static bool NumberLock {
 			get { return ConsoleDriver.NumberLock; }
 		}
@@ -611,25 +610,21 @@ namespace System
 			set { ConsoleDriver.TreatControlCAsInput = value; }
 		}
 
-		[MonoLimitation ("Only works on windows")]
 		public static int WindowHeight {
 			get { return ConsoleDriver.WindowHeight; }
 			set { ConsoleDriver.WindowHeight = value; }
 		}
 
-		[MonoLimitation ("Only works on windows")]
 		public static int WindowLeft {
 			get { return ConsoleDriver.WindowLeft; }
 			set { ConsoleDriver.WindowLeft = value; }
 		}
 
-		[MonoLimitation ("Only works on windows")]
 		public static int WindowTop {
 			get { return ConsoleDriver.WindowTop; }
 			set { ConsoleDriver.WindowTop = value; }
 		}
 
-		[MonoLimitation ("Only works on windows")]
 		public static int WindowWidth {
 			get { return ConsoleDriver.WindowWidth; }
 			set { ConsoleDriver.WindowWidth = value; }

mcs/class/corlib/System/Delegate.cs

@@ -115,6 +115,8 @@ namespace System
 			}
 		}
 
+		internal IntPtr GetNativeFunctionPointer () => method_ptr;
+
 		//
 		// Methods
 		//

mcs/class/corlib/System/Nullable.cs

@@ -186,6 +186,17 @@ namespace System
 				return null;
 			return (T) o;
 		}
+
+		static T? UnboxExact (object o)
+		{
+			if (o == null)
+				return null;
+			if (o.GetType() != typeof (T))
+				throw new InvalidCastException();
+
+			return (T) o;
+		}
+
 #pragma warning restore 169
 	}
 }

mcs/class/corlib/System/TermInfoDriver.cs

@@ -391,6 +391,10 @@ namespace System {
 
 		void ChangeColor (string format, ConsoleColor color)
 		{
+			if (String.IsNullOrEmpty (format))
+				// the terminal doesn't support colors
+				return;
+
 			int ccValue = (int)color;
 			if ((ccValue & ~0xF) != 0)
 				throw new ArgumentException("Invalid Console Color");