svcutil.exe client code question – trying to assign objects to collection.

I have exposed a BT orchestration as a WCF Service and I have run svcutil.exe to create the client code.  Here is a snippet of the my code and the generated client code  (I have removed decorations etc) …

My test code …

Console.WriteLine(“Enter value to be sent to the BizTalk orchestration exposed as a WCF service:”);
string name = Console.ReadLine();
MaterialEstimateAuthorization_OrchMaterialEstimate_Port_1Client client = new MaterialEstimateAuthorization_OrchMaterialEstimate_Port_1Client();
materialEstimate matEstimate = new materialEstimate();matEstimate.workOrderID = “456”;
materialEstimateLocationMaterialContent matContent = new materialEstimateLocationMaterialContent();
matContent.assemblyUnit = “1”;
matContent.LID = “2”;
matContent.quantity = 3;
matContent.siteID = “4”;
matContent.status = “A”;

matEstimate.LocationMaterialContent[0] = matContent; 

//or

matEstimate.LocationMaterialContent.setValue(matContent,0); 

// How do I assign the instantiated objects of materialEstimateLocationMaterialContent to the collection 
// materialEstimateLocationMaterialContent[] collection which is member of the instantiated materialEstimate object?  I keep getting a null 
// reference error stating that  “Object reference not set to an instance of an object”.  Any help would be greatly appreaciated, thanks. 
RootOutMaterialEstimate outDoc;
outDoc = client.Operation_1(matEstimate);
Console.WriteLine(“Value returned from the WCF service:”);
Console.WriteLine(outDoc.Resp);
client.Close();

Code generated from svcutil.exe ….

public partial class materialEstimate
{
    private string workOrderIDField;
    private materialEstimateLocationMaterialContent[] locationMaterialContentField;
    public string workOrderID
    {
        get
        {
            return this.workOrderIDField;
        }
        set
        {
            this.workOrderIDField = value;
        }
    }
   
    public materialEstimateLocationMaterialContent[] LocationMaterialContent
    {
        get
        {
            return this.locationMaterialContentField;
        }
        set
        {
            this.locationMaterialContentField = value;
        }
    }
}

public partial class materialEstimateLocationMaterialContent
{
   
    private string lIDField;
    private string siteIDField;
    private byte quantityField;
    private string statusField;
    private string assemblyUnitField;

    public string LID
    {
        get
        {
            return this.lIDField;
        }
        set
        {
            this.lIDField = value;
        }
    }
   
    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order=1)]
    public string siteID
    {
        get
        {
            return this.siteIDField;
        }
        set
        {
            this.siteIDField = value;
        }
    }
   
    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order=2)]
    public byte quantity
    {
        get
        {
            return this.quantityField;
        }
        set
        {
            this.quantityField = value;
        }
    }
   
    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order=3)]
    public string status
    {
        get
        {
            return this.statusField;
        }
        set
        {
            this.statusField = value;
        }
    }
   
    /// <remarks/>
    public string assemblyUnit
    {
        get
        {
            return this.assemblyUnitField;
        }
        set
        {
            this.assemblyUnitField = value;
        }
    }
}

}