Add Console.Write{Line} span overloads (#105531)

Author: stephentoub

src/libraries/System.Console/ref/System.Console.cs

@@ -160,6 +160,7 @@ public static void Write(long value) { }
         public static void Write(object? value) { }
         public static void Write(float value) { }
         public static void Write(string? value) { }
+        public static void Write(System.ReadOnlySpan<char> value) { }
         public static void Write([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute("CompositeFormat")] string format, object? arg0) { }
         public static void Write([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute("CompositeFormat")] string format, object? arg0, object? arg1) { }
         public static void Write([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute("CompositeFormat")] string format, object? arg0, object? arg1, object? arg2) { }
@@ -181,6 +182,7 @@ public static void WriteLine(long value) { }
         public static void WriteLine(object? value) { }
         public static void WriteLine(float value) { }
         public static void WriteLine(string? value) { }
+        public static void WriteLine(ReadOnlySpan<char> value) { }
         public static void WriteLine([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute("CompositeFormat")] string format, object? arg0) { }
         public static void WriteLine([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute("CompositeFormat")] string format, object? arg0, object? arg1) { }
         public static void WriteLine([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute("CompositeFormat")] string format, object? arg0, object? arg1, object? arg2) { }

src/libraries/System.Console/src/System/Console.cs

@@ -813,6 +813,12 @@ public static void WriteLine(string? value)
             Out.WriteLine(value);
         }
 
+        [MethodImplAttribute(MethodImplOptions.NoInlining)]
+        public static void WriteLine(ReadOnlySpan<char> value)
+        {
+            Out.WriteLine(value);
+        }
+
         [MethodImplAttribute(MethodImplOptions.NoInlining)]
         public static void WriteLine([StringSyntax(StringSyntaxAttribute.CompositeFormat)] string format, object? arg0)
         {
@@ -969,6 +975,12 @@ public static void Write(string? value)
             Out.Write(value);
         }
 
+        [MethodImplAttribute(MethodImplOptions.NoInlining)]
+        public static void Write(ReadOnlySpan<char> value)
+        {
+            Out.Write(value);
+        }
+
         private static void HandlePosixSignal(PosixSignalContext ctx)
         {
             Debug.Assert(ctx.Signal == PosixSignal.SIGINT || ctx.Signal == PosixSignal.SIGQUIT);

src/libraries/System.Console/tests/ReadAndWrite.cs

@@ -105,6 +105,7 @@ private static void WriteCore()
         Console.Write(50UL);
         Console.Write(new object());
         Console.Write("Hello World");
+        Console.Write("Hello World".AsSpan());
     }
 
     private static void WriteLineCore()
@@ -145,6 +146,7 @@ private static void WriteLineCore()
         Console.WriteLine(50UL);
         Console.WriteLine(new object());
         Console.WriteLine("Hello World");
+        Console.WriteLine("Hello World".AsSpan());
     }
 
     [Fact]
@@ -187,6 +189,7 @@ public static async Task OutWriteAndWriteLineOverloads()
                 writer.Write(50UL);
                 writer.Write(new object());
                 writer.Write("Hello World");
+                writer.Write("Hello World".AsSpan());
 
                 writer.Flush();