Error in coding

Question

Hi..
I am working in visual studio 2005 working on dataset.
having fallowing code which is not working well getting lots of error.
 public static XmlSchemaComplexType GetTypedTableSchema(XmlSchemaSet xs)
      {
        XmlSchemaComplexType schemaComplexType = new XmlSchemaComplexType();
        XmlSchemaSequence xmlSchemaSequence = new XmlSchemaSequence();
        DarusSalamDataSet darusSalamDataSet = new DarusSalamDataSet();
        xs.Add(darusSalamDataSet.GetSchemaSerializable());
        XmlSchemaAny xmlSchemaAny1 = new XmlSchemaAny();
        xmlSchemaAny1.Namespace = "http://www.w3.org/2001/XMLSchema";
        xmlSchemaAny1.MinOccurs = new Decimal(0);
        xmlSchemaAny1.MaxOccurs = new Decimal(-1, -1, -1, false, (byte) 0);
        xmlSchemaAny1.ProcessContents = XmlSchemaContentProcessing.Lax;
        xmlSchemaSequence.Items.Add((XmlSchemaObject) xmlSchemaAny1);
        XmlSchemaAny xmlSchemaAny2 = new XmlSchemaAny();
        xmlSchemaAny2.Namespace = "urn:schemas-microsoft-com:xml-diffgram-v1";
        xmlSchemaAny2.MinOccurs = new Decimal(1);
        xmlSchemaAny2.ProcessContents = XmlSchemaContentProcessing.Lax;
        xmlSchemaSequence.Items.Add((XmlSchemaObject) xmlSchemaAny2);
        schemaComplexType.Attributes.Add((XmlSchemaObject) new XmlSchemaAttribute()     
          Name = "namespace",
          FixedValue = darusSalamDataSet.Namespace
            );
        schemaComplexType.Attributes.Add((XmlSchemaObject) new XmlSchemaAttribute()
        {
          Name = "tableTypeName",
          FixedValue = "UsersDataTable"
        });
        schemaComplexType.Particle = (XmlSchemaParticle) xmlSchemaSequence;
        return schemaComplexType;
      }
please help me.
THanks