Sort and remove (unused) using statements Roslyn script/code?

Question

Sort and remove (unused) using statements Roslyn script/code? I\'m looking for some .NET/Roslyn (compiler as service) code that can run through a project and sort and remov

Answer 1

For removing statements, check out the FAQ item 30 in the solution in the following directory, in the FAQ.cs file: (Note this is for the June 2012 CTP version of Roslyn).

%userprofile%\Documents\Microsoft Roslyn CTP - June 2012\CSharp\APISampleUnitTestsCS

There is also a FAQ which refers to this project:

http://www.codeplex.com/Download?ProjectName=dlr&DownloadId=386858

Here is the sample rewriter from the sample code, which removes assignment statements.

// Below SyntaxRewriter removes multiple assignement statements from under the 
// SyntaxNode being visited.
public class AssignmentStatementRemover : SyntaxRewriter
{
    public override SyntaxNode VisitExpressionStatement(ExpressionStatementSyntax node)
    {
        SyntaxNode updatedNode = base.VisitExpressionStatement(node);

        if (node.Expression.Kind == SyntaxKind.AssignExpression)
        {
            if (node.Parent.Kind == SyntaxKind.Block)
            {
                // There is a parent block so it is ok to remove the statement completely.
                updatedNode = null;
            }
            else
            {
                // The parent context is some statement like an if statement without a block.
                // Return an empty statement.
                updatedNode = Syntax.EmptyStatement()
                    .WithLeadingTrivia(updatedNode.GetLeadingTrivia())
                    .WithTrailingTrivia(updatedNode.GetTrailingTrivia());
            }
        }
     return updatedNode;
    }
}