Extension method '<methodname>' defined in '<modulename>' is not generic (or has no free type parameters) and so cannot have type arguments
A type argument has been specified in a call to an extension method that either has no generic parameters or has no generic parameters for which a type is not already specified. For example, the following code causes this error.
' The extension method is not generic.
<Extension()> _
Sub Example(ByVal str As String)
' Body of the Sub.
End Sub
Dim str = "hi"
'' The call to Example specifies a type argument.
'' Not valid.
'str.Example(Of String)()
Error ID: BC36907
To correct this error
Add a type parameter to the extension method definition.
Remove the extra type argument from the procedure call.