kill a particular word document out of many

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C#3.0

C#

VB

Hi,
In my system I open several word document.
I want to kill a particular word document using vb.net/ c#.

Please anybody help.

currently I am using below code which is killing all word application

' Kill  word application
if  isWordRunning =true then
For Each process As Process In Process.GetProcessesByName("winword.exe")
    process.Kill
    process.WaitForExit
Next
end if
' Get any word application is runing or not
    Private Function isWordRunning() As Boolean
        Return (System.Diagnostics.Process.GetProcessesByName("winword").Length > 0)
    End Function