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The property '{0}' is set more than once

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

This error occurs when you attempt to assign values to the same property more than one time in the same element declaration.

This error is raised when the file is a well-formed XAML document, but contains one or more type mismatches.

Error ID: XAML0501

Note

This error message also applies to the Silverlight Designer.

To correct this error

  • Remove all except one of the property assignments.

Example

The following code example shows how to assign a value to the Content property. Uncomment the second declaration to raise error XAML0501.

<Button Content='OK'></Button>

<!-- Uncomment the following line to raise error XAML0501. -->
<!-- <Button Content='OK'>OK</Button> -->

See Also

Concepts

XAML Errors and Help

Other Resources

XAML in WPF

XAML in Silverlight

Properties