The XmlSchemaIntegrityValidation class provides a way to verify integrity constraints of an XML schema at runtime. It is part of the System.Xml namespace.

Syntax

public sealed class XmlSchemaIntegrityValidation
{
    public XmlSchemaIntegrityValidation();
    public XmlSchemaIntegrityValidation(string schemaFile);
    public void Load(string schemaFile);
    public bool Validate(XmlReader xmlReader);
    public ValidationEventHandler ValidationEventHandler { get; set; }
    public XmlResolver XmlResolver { get; set; }
}

Remarks

The class offers two ways to load a schema: via a constructor that accepts a file path, or by calling Load. The Validate method checks the supplied XML document against the loaded schema, raising validation events through the ValidationEventHandler delegate.

Typical usage patterns:

• Validate configuration files during application startup.
• Enforce data contracts in web services.
• Perform ad‑hoc validation in development tools.

Examples

The following example demonstrates how to validate an XML file against a schema.

using System;
using System.Xml;
using System.Xml.Schema;

class Program
{
    static void Main()
    {
        var validator = new XmlSchemaIntegrityValidation("schema.xsd");
        validator.ValidationEventHandler += (sender, e) =>
        {
            Console.WriteLine($"{e.Severity}: {e.Message}");
        };

        using (var reader = XmlReader.Create("data.xml"))
        {
            bool isValid = validator.Validate(reader);
            Console.WriteLine(isValid ? "Document is valid." : "Document is invalid.");
        }
    }
}

See Also