Fixed SD2-1079: Cast statements not converted correctly from C# to VB.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@2034 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/NRefactory/Project/Src/Visitors/ToVBNetConvertVisitor.cs

@@ -24,6 +24,7 @@ namespace ICSharpCode.NRefactory.Visitors
 		//   Anonymous methods are put into new methods
 		//   Simple event handler creation is replaced with AddressOfExpression
 		//   Move Imports-statements out of namespaces
+		//   Parenthesis around Cast expressions remove - these are syntax errors in VB.NET
 		
 		List<INode> nodesToMoveToCompilationUnit = new List<INode>();
 		
@@ -316,5 +317,14 @@ namespace ICSharpCode.NRefactory.Visitors
 				constructorDeclaration.Modifier |= Modifiers.Private;
 			return base.VisitConstructorDeclaration(constructorDeclaration, data);
 		}
+		
+		public override object VisitParenthesizedExpression(ParenthesizedExpression parenthesizedExpression, object data)
+		{
+			base.VisitParenthesizedExpression(parenthesizedExpression, data);
+			if (parenthesizedExpression.Expression is CastExpression) {
+				ReplaceCurrentNode(parenthesizedExpression.Expression); // remove parenthesis
+			}
+			return null;
+		}
 	}
 }

src/Libraries/NRefactory/Test/Output/VBNet/CSharpToVBConverterTest.cs

@@ -435,5 +435,11 @@ End Class
 		{
 			TestStatement("global::System.String a;", "Dim a As Global.System.String");
 		}
+		
+		[Test]
+		public void TestMethodCallOnCastExpression()
+		{
+			TestStatement("((IDisposable)o).Dispose();", "DirectCast(o, IDisposable).Dispose()");
+		}
 	}
 }