Convert VB to C#

Use [] instead of () in C#.  So, for example, use

Request["propertyid"]

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instead of

Request("propertyid")

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You'll need to do the same with

Request.Form("username")

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Not a web guy here but -
Are you missing the count?

Request("propertyid")
or
Request("propertyid").Count
or
Request("propertyid").Count()
something like that maybe

Ah yes!   That was dumb since i have written tons of code today - don't know why I missed it.   So now I get

 'char' does not contain a definition for 'propertyid' and no extension method 'propertyid' accepting a first argument of type 'char' could be found (are you missing a using directive or an assembly reference?)

var Properties in Request["propertyid"]

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I am not sure how to write that - basically looking for each item in the list from the Request["propertyid"] form field.

Request.Form["propertyid"].Length

BillyDvD - what is that replacing?

Sorry - posted to soon - lol
You need to iterate 'something' that something was originaly the Count for "propertyid" -

So :
for (int i = 0; i < Request.Form["propertyid"].Length; i++)
{
       //---| Do you r string building here |---
}

i may need to be 1 for the for loop instead of zero.....

BillyDvD - how do I reference the value to save it though?   I need the value of each iteration.

for ( int i = 0 ; i < this.Request.Form[ "propertyid" ].Length ; i++ )
            {
                string strSQL = "Insert into property_assign (assigned_to, propertyid) VALUES ('" + this.Request.Form[ "assigned_to" ] + "','" + this.Request.Form[ "propertyid" ][ i ] + "')";
                //---| Now use the string..... |---
            }

It is the [i] now - it was (a)

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That is giving me integers and not the actual value...

sql2 = "Insert into property_assign (assigned_to, propertyid) VALUES (@0, @1)";
                db.Execute(sql2, this.Request.Form["username"], this.Request.Form["propertyid"][i]);

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I just looked at this more closely - this is a comma-delimited list of items - they are longer than one character so the length thing isn't going to work.  IT looks like
Asdasd_123123, ASD_54123, FAS_2141...

Not sure if this will help:

 string strSQL = string.Empty;

            if ( this.Request.Form[ "propertyid" ].Length > 0 )
                strSQL = "Insert into property_assign (assigned_to, propertyid) VALUES ('" + this.Request.Form[ "assigned_to" ] + "','" +
                     this.Request.Form[ "propertyid" ] + "')";

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Do you need to iterate each piece of the comma delimeted list?
I am not sure what you are trying to "get" from this loop.
If you had the input to the loop and the outputs pre code change - then we can reverse engineer this much easier.

I need the values from the list because we are creating a record for each of the properties.    The code was super simple in VB...  

 For a = 1 to Request.Form("propertyid").Count
strSQL = "Insert into property_assign (assigned_to, propertyid) VALUES ("
strSQL = strSQL & "'" & Request.Form("assigned_to") & "',"
strSQL = strSQL & "'" & Request.Form("propertyid")(a) & "')"

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digitalwise - Just to let you know, I may not be available the rest of this evening. I may be able to pick this back up around 6AM CST though.

Thanks
BillyDvD

This was perfect!