Added some Parse methods to the compilation unit.

ICSharpCode.NRefactory.CSharp/Ast/CompilationUnit.cs

@@ -28,6 +28,10 @@ using System.Collections.Generic;
 using ICSharpCode.NRefactory.CSharp.Resolver;
 using ICSharpCode.NRefactory.CSharp.TypeSystem;
 using ICSharpCode.NRefactory.TypeSystem;
+using System.Threading;
+using Mono.CSharp;
+using System.IO;
+using ICSharpCode.NRefactory.Editor;
 
 namespace ICSharpCode.NRefactory.CSharp
 {
@@ -116,6 +120,37 @@ namespace ICSharpCode.NRefactory.CSharp
 			v.VisitCompilationUnit (this, null);
 			return v.ParsedFile;
 		}
+		
+		public static CompilationUnit Parse (string text, string fileName = "", CompilerSettings settings = null, CancellationToken cancellationToken = default (CancellationToken))
+		{
+			var parser = new CSharpParser ();
+			if (settings != null)
+				parser.CompilerSettings = settings;
+			return parser.Parse (text, fileName);
 		}
+		
+		public static CompilationUnit Parse (TextReader reader, string fileName = "", CompilerSettings settings = null, CancellationToken cancellationToken = default (CancellationToken))
+		{
+			var parser = new CSharpParser ();
+			if (settings != null)
+				parser.CompilerSettings = settings;
+			return parser.Parse (reader, fileName, 0);
 		}
 		
+		public static CompilationUnit Parse (Stream stream, string fileName = "", CompilerSettings settings = null, CancellationToken cancellationToken = default (CancellationToken))
+		{
+			var parser = new CSharpParser ();
+			if (settings != null)
+				parser.CompilerSettings = settings;
+			return parser.Parse (stream, fileName, 0);
+		}
+		
+		public static CompilationUnit Parse (ITextSource textSource, string fileName = "", CompilerSettings settings = null, CancellationToken cancellationToken = default (CancellationToken))
+		{
+			var parser = new CSharpParser ();
+			if (settings != null)
+				parser.CompilerSettings = settings;
+			return parser.Parse (textSource, fileName, 0);
+		}
+	}
+}

ICSharpCode.NRefactory.CSharp/Parser/CSharpParser.cs

@@ -3634,7 +3634,7 @@ namespace ICSharpCode.NRefactory.CSharp
 		
 		public CompilerSettings CompilerSettings {
 			get;
-			private set;
+			internal set;
 		}
 		
 		public Action<CompilerCompilationUnit> CompilationUnitCallback {