public static Expression <Action <BindingContext, TextWriter, object> > Bind(CompilationContext context, Expression body, string templatePath) { var configuration = ExpressionShortcuts.Arg(context.Configuration); var writerParameter = ExpressionShortcuts.Parameter <TextWriter>("buffer"); var objectParameter = ExpressionShortcuts.Parameter <object>("data"); var bindingContext = ExpressionShortcuts.Arg <BindingContext>(context.BindingContext); var inlinePartialsParameter = ExpressionShortcuts.Null <IDictionary <string, Action <TextWriter, object> > >(); var textEncoder = configuration.Property(o => o.TextEncoder); var encodedWriterExpression = ExpressionShortcuts.Call(() => EncodedTextWriter.From(writerParameter, (ITextEncoder)textEncoder)); var parentContextArg = ExpressionShortcuts.Var <BindingContext>("parentContext"); var newBindingContext = ExpressionShortcuts.Call( () => BindingContext.Create(configuration, objectParameter, encodedWriterExpression, parentContextArg, templatePath, (IDictionary <string, Action <TextWriter, object> >)inlinePartialsParameter) ); var shouldDispose = ExpressionShortcuts.Var <bool>("shouldDispose"); Expression blockBuilder = ExpressionShortcuts.Block() .Parameter(bindingContext) .Parameter(shouldDispose) .Line(ExpressionShortcuts.Condition() .If(objectParameter.Is <BindingContext>(), bindingContext.Assign(objectParameter.As <BindingContext>()) ) .Else(block => { block.Line(shouldDispose.Assign(true)); block.Line(bindingContext.Assign(newBindingContext)); }) ) .Line(ExpressionShortcuts.Try() .Body(block => block.Lines(((BlockExpression)body).Expressions)) .Finally(ExpressionShortcuts.Condition() .If(shouldDispose, bindingContext.Call(o => o.Dispose())) ) ); return(Expression.Lambda <Action <BindingContext, TextWriter, object> >(blockBuilder, (ParameterExpression)parentContextArg.Expression, (ParameterExpression)writerParameter.Expression, (ParameterExpression)objectParameter.Expression)); }