How may I pass the set setinactiveconnectiontimeout in connection string

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VB

Oracle

hi, i'm using oracle sql dveloper 11g. how may i set setInactiveConnectionTimeout in my connection string
My connection string format is

ConnectionString = "SERVER=" & Server & ";" & _
              "Connection Lifetime=" & connectionLifetime & ";" & _
              "Max Pool Size=" & maxPoolSize & ";" & _
              "Pooling=" & pooling.ToString() & ";" & _
              "UID=" & UserName & ";" & _
              "PWD=" & Password & ";" 

What I have tried:

i tried to set maxidle size like maxIdle = 50 and setInactiveConnectionTimeout =5 but its not working ..im getting error like keyword not valid