Convert and give me VBA to c#

Question

Here is my VBA code

 

sTemp = sGetDocVar("ParaNo1Text")

For i = 0 To cbxNumbPara1.ListCount - 1

If InStr(1, UCase(cbxNumbPara1.List(i)), UCase(sTemp)) = 1 Then

cbxNumbPara1.ListIndex = i

lblNumbPara1 = FirstWord(cbxNumbPara1.List(i))

End If

Next

If cbxNumbPara1.ListIndex < 0 Then cbxNumbPara1.ListIndex = 0

If lblNumbPara1 = "" Then lblNumbPara1 = "Not set"

 

Converted Code

 

sTemp = sGetDocVar("ParaNo1Text");

for (i = 0; i <= cbxNumbPara1.ListCount - 1; i++) {

if (Strings.InStr(1, Strings.UCase(cbxNumbPara1.List(i)), Strings.UCase(sTemp)) == 1) {

cbxNumbPara1.ListIndex = i;

lblNumbPara1 = FirstWord(cbxNumbPara1.List(i));

}

}

if (cbxNumbPara1.ListIndex < 0)

cbxNumbPara1.ListIndex = 0;

if (string.IsNullOrEmpty(lblNumbPara1))

lblNumbPara1 = "Not set";

 

I am getting errors

1)  Strings.InStr.

2)  Strings.UCase

3)   cbxNumbPara1.List(i)

 

Please anyone correct and send me the code