Visual Studio Wcf Test Client - entering an Int array

I've found the Visual Studio WCF test client quite useful when it comes to a quick test of my WCF service. This is the test client found in this location relative to your Visual Studio install directory:

\Common7\IDE\WcfTestClient.exe

I have a few serv开发者_JAVA百科ice calls that require a parameter of type System.Int32[]

I can't seem to figure out what values to enter against for this parameter as i keep receiving the error

'[value entered]' is not a valid value for this type

Trying to enter the value 27 i have tried the following, but all fails

27

{ 27 }
new System.Int32[] { 27 }

Can anyone please help with how to do this

Type length=1 in the Value column, a ▶ will appear allowing you to add values in the array: