error CS0266: Cannot implicitly convert type 'object' to 'string'

Question

I added wpf usercontrol to winform project.
However I failed compilation.

I got errors. error CS0266: Cannot implicitly convert type 'object' to 'string'.

string abc = test.PropertyAccessor.GetProperty("name");  
//type of test is Microsoft.Office.Interop.Outlook.Attachment  
//test.PropertyAccessor.GetProperty return dynamic.

I found the cause.

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:local="clr-namespace:CustomControls"
                    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
                    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                    mc:Ignorable="d">

xmlns:local="clr-namespace:CustomControls" is the cause.
If xmlns:local="clr-namespace:CustomControls" is removed, I don't get error.

Why is that?

Answer 1

I couldn't find the cause, but I resolved it anyway.
I added explicit conversion.

string abc = (string)test.PropertyAccessor.GetProperty("name");