Fixing issues as per suggestions from @kevcunnane

src/Microsoft.SqlTools.ServiceLayer/Workspace/Contracts/WorkspaceSymbols.cs

@@ -0,0 +1,62 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlTools.ServiceLayer.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.Workspace.Contracts
+{
+    public enum SymbolKind 
+    {
+        File = 1,
+        Module = 2,
+        Namespace = 3,
+        Package = 4,
+        Class = 5,
+        Method = 6,
+        Property = 7,
+        Field = 8,
+        Constructor = 9,
+        Enum = 10,
+        Interface = 11,
+        Function = 12,
+        Variable = 13,
+        Constant = 14,
+        String = 15,
+        Number = 16,
+        Boolean = 17,
+        Array = 18,
+    }
+
+    public class SymbolInformation 
+    {
+        public string Name { get; set; }
+
+        public SymbolKind Kind { get; set; }
+
+        public Location Location { get; set; }
+
+        public string ContainerName { get; set;}
+    }
+
+    public class DocumentSymbolRequest
+    {
+        public static readonly
+            RequestType<TextDocumentIdentifier, SymbolInformation[]> Type =
+            RequestType<TextDocumentIdentifier, SymbolInformation[]>.Create("textDocument/documentSymbol");
+    }
+
+    public class WorkspaceSymbolRequest
+    {
+        public static readonly
+            RequestType<WorkspaceSymbolParams, SymbolInformation[]> Type =
+            RequestType<WorkspaceSymbolParams, SymbolInformation[]>.Create("workspace/symbol");
+    }
+
+    public class WorkspaceSymbolParams
+    {
+        public string Query { get; set;}
+    }
+}
+