Getting an error 

> 
> keyword not supported error 
> 
> 
> 

from SQL Server when I try to open a connection - I am using Visual Studio 2013 Community edition. 

```
static class datastuff
{
    public static void makeconnection()
    string constr = @"data source=(LocalDB)\v11.0;" + @"C:\Users\leon3\Documents\Visual Studio 2013\Projects\WindowsApplication1\WindowsApplication1\sqlserver.mdf;integrated security=True;connect timeout=30";

    SqlConnection con = new SqlConnection(constr);
    con.Open()
}

```