Compiling Old Code in C# for SQL Assembly Errors

I have old code that I just decompile (source was lost but we own it).

I'm now trying to recompile it but have these erros:

 Error  1   'System.Data.SqlTypes.SqlBoolean.operator true(System.Data.SqlTy开发者_如何学Gopes.SqlBoolean)': cannot explicitly call operator or accessor   C:\NCESTableGenerator\NCESTableGenerator\db\OutputTableDAO.cs   89  32  NCESTableGenerator

on the following piece of code:

 if (SqlBoolean.op_True(reader.GetSqlInt32(0) == 1))

and

 Error  3   Cannot convert type 'bool' to 'sbyte'   C:\NCESTableGenerator\NCESTableGenerator\Formatter.cs   172 30  NCESTableGenerator

on the following piece of code:

 public static string GetEstimateFloatStr(double data, int sn, int num, ref bool roundedZero, ref bool lowN)
    {
        if (sn <= 30)
        {
            sbyte num1 = (sbyte) lowN;
            lowN = true;
            return "‡";

Any ideas?

---

In the first line I think it's safe to rewrite it as

if (reader.GetSqlInt32(0) == 1)

and the 2nd one the troublesome line (looks like it can be removed because of the return) but if you cant remove it change it to

Int16 num1 = (Int16)lowN;

or

char num1 = (char)lowN;

Since Sbyte is not CLS-Compliant as listed by MSDN.