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Test private methods, fields or properties by using the PrivateObject in the Microsoft Unit Testing.&nbsp; 

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As you know, In Catglobe, we use Reflection to test some private fileds, properties or methods. After several minutes of googling, I found the better solution to solve this issue&nbsp;I think by using PrivateObject class in&nbsp;Microsoft.VisualStudio.TestTools.UnitTesting<br>

<u>Note</u>: To use PrivateObject, you have to add Microsoft.VisualStudio.TestTools.UnitTesting dll to DomainTester. <br>&nbsp;<br>PrivateObject Class:&nbsp; 

*&nbsp;&nbsp;&nbsp;Invoke method: Used to access the members of the private object.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;eg:&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;YourClass class = new YourClass();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;var privateObject = new PrivateObject(class);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;privateObject.Invoke("YourPrivateMethodName", new object[] { arg1, arg2 } ); 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The code above will call the your private method and pass it two integer parameters. This is the equivalent of calling resel.YourPrivateMethodName(arg1, arg2). 

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*&nbsp;&nbsp;&nbsp;GetProperty method: Used to get the value of the property of the wrapped object

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;eg:&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;YourClass class = new YourClass();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;var privateObject = new PrivateObject(class);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;privateObject.GetProperty("YourPrivatePropertyName", null);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The code above will call the your private property. This is the equivalent of calling resel.YourPrivatePropertyName&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>Note</u>: The second argument is a property index&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;private int Column[int index]&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In this case, you will get private property by using privateObject.GetProperty("YourPrivatePropertyName", your index); 

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*&nbsp;&nbsp;&nbsp;SetProperty method: Used to set the value of the property of the wrapped object

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;eg:&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;YourClass class = new YourClass();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;var privateObject = new PrivateObject(class);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;privateObject.SetProperty("YourPrivatePropertyName", null, new value); 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The code above will call the your private property. This is the equivalent of calling resel.YourPrivatePropertyName = new value&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>Note</u>: The second argument is a property index . 

If you want to know in detail, you might visit msnd with link is&nbsp;: http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.testtools.unittesting.privateobject(VS.80).aspx