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Compilation errors in CustomerDetails.g.cs caused by x:Bind

See original GitHub issue

I can’t build the project using Visual Studio 2017 15.9 Preview 3 & SDK 17763.

The errors are:

3>------ Build started: Project: Inventory.App, Configuration: Debug x86 ------
3>C:\Users\habakker\Source\Repos\InventorySample\src\Inventory.App\Controls\Buttons\RoundButton.cs(44,29,44,41): warning CS0108: 'RoundButton.CornerRadius' hides inherited member 'Control.CornerRadius'. Use the new keyword if hiding was intended.
3>C:\Users\habakker\Source\Repos\InventorySample\src\Inventory.App\Controls\Buttons\RoundButton.cs(50,51,50,71): warning CS0108: 'RoundButton.CornerRadiusProperty' hides inherited member 'Control.CornerRadiusProperty'. Use the new keyword if hiding was intended.
3>C:\Users\habakker\Source\Repos\InventorySample\src\Inventory.App\obj\x86\Debug\Views\Customer\Details\CustomerDetails.g.cs(924,72,924,87): error CS0029: Cannot implicitly convert type 'string' to 'int?'
3>C:\Users\habakker\Source\Repos\InventorySample\src\Inventory.App\obj\x86\Debug\Views\Customer\Details\CustomerDetails.g.cs(950,71,950,86): error CS0029: Cannot implicitly convert type 'string' to 'decimal?'

The offending parts are:

private void UpdateTwoWay_17_Text()
{
    if (this.initialized)
    {
        if (this.dataRoot != null)
        {
            if (this.dataRoot.EditableItem != null)
            {
                this.dataRoot.EditableItem.TotalChildren = this.obj17.Text; //this line
            }
        }
    }
}

and

private void UpdateTwoWay_19_Text()
{
    if (this.initialized)
    {
        if (this.dataRoot != null)
        {
            if (this.dataRoot.EditableItem != null)
            {
                this.dataRoot.EditableItem.YearlyIncome = this.obj19.Text; //and this line
            }
        }
    }
}

The error seems to be in the x:Bind generated code which seems not process the DataType="Decimal" and DataType="Integer" attribute correctly. This attribute is used at https://github.com/Microsoft/InventorySample/blob/master/src/Inventory.App/Views/Customer/Details/CustomerDetails.xaml#L39,L43