Question

I converted the following function from vb.net to c# but I cannot figure this out.

Error 4 The name ‘Strings’ does not exist in the current context

public string GetBetween(string StringText)
    {
        string functionReturnValue = null;

        string TMP = null;
        string FromS = null;
        string ToS = null;
        FromS = "<Modulus>";
        ToS = "</Modulus>";

        TMP = Strings.Mid(StringText, Strings.InStr(StringText, FromS) + Strings.Len(FromS), Strings.Len(StringText));
        TMP = Strings.Left(TMP, Strings.InStr(TMP, ToS) - 1);

        functionReturnValue = TMP;

        return functionReturnValue;

    }

Answer 1

Strings is a VB.net class. You’d have to reference the Microsoft.VisualBasic.dll assembly and use the Microsoft.VisualBasic namespace if you’d want to be able to use it.

It would be better if you just avoided using VB.net methods whenever possible.

public string GetBetween(string str, string start = "<Modulus>", string end = "</Modulus>")
{
    var startIndex = str.IndexOf(start);
    var endIndex = str.LastIndexOf(end);
    if (startIndex == -1 || endIndex == -1 || startIndex > endIndex)
        return str;
    return str.Substring(startIndex + start.Length,
                         str.Length - start.Length - end.Length);
}