Whitespace handling in web services has changed between 1.1 and 2.0.  If a
field in a dataset contains only spaces, 1.1 returned an empty string when it
crossed the web services boundary.  Under 2.0, it preserves the spaces.  
While this is correct, it breaks some of our code that was working.  Any easy
work-around?

The following web service/client shows the problem.  Try it in 1.1 and 2.0.

*** Service ***

[WebMethod]
public DataSet GiveMeWhitespace()
{
    DataSet testDS = new DataSet();
    DataTable testTbl = new DataTable("MyTable");
    testDS.Tables.Add(testTbl);
    DataColumn testCol = new DataColumn("Col1", "abc".GetType());
    testCol.AllowDBNull = true;
    testTbl.Columns.Add(testCol);

    DataRow newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = null;

    newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = "";

    newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = " ";

    newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = "   ";

    newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = "A value";

    newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = "Another  value";

    newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = "A value  ";

    newRow = testTbl.NewRow();
    testTbl.Rows.Add(newRow);
    newRow["Col1"] = "Another  value  ";

    return testDS;
}

*** Client ***

localhost.Service1 svc = new localhost.Service1();
DataSet testDS = svc.GiveMeWhitespace();       

foreach (DataRow aRow in testDS.Tables[0].Rows)
{
    if (!aRow.IsNull("Col1"))
    {
        TextBox1.Text = TextBox1.Text + "*" + aRow["Col1"].ToString() + "*\n";
    }
    else
    {
        TextBox1.Text = TextBox1.Text + "*{null}*\n";
    }
}