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diff --git a/ThirdParty/CsvHelper-master/src/CsvHelper.Website/input/examples/configuration/class-maps/validation/index.md b/ThirdParty/CsvHelper-master/src/CsvHelper.Website/input/examples/configuration/class-maps/validation/index.md
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+# Validation
+
+If you want to ensure your data conforms to some sort of standard, you can validate it.
+
+###### Data
+
+```
+Id,Name
+1,on-e
+```
+
+###### Example
+
+```cs
+void Main()
+{
+    using (var reader = new StreamReader("path\\to\\file.csv"))
+    using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
+    {
+        csv.Context.RegisterClassMap<FooMap>();
+        csv.GetRecords<Foo>().ToList().Dump();
+    }
+}
+
+public class Foo
+{
+    public int Id { get; set; }
+    public string Name { get; set; }
+    public DateTimeOffset? Date { get; set; }
+}
+
+public class FooMap : ClassMap<Foo>
+{
+    public FooMap()
+    {
+        Map(m => m.Id);
+        Map(m => m.Name).Validate(field => !field.Contains("-"));
+    }
+}
+```