Create Forms-Validation.md

docs/en/UI/Blazor/Forms-Validation.md

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+# Blazor UI: Forms & Validation
+
+ABP Framework Blazor UI is based on the [Blazorise](https://blazorise.com/docs) and does not have a built-in form validation infrastructure. However, you can use the [Blazorise validation infrastructure](https://blazorise.com/docs/components/validation) to validate your forms.
+
+## Sample
+
+_Example provided by official Blazorise documentation._
+
+```html
+<Validation Validator="ValidationRule.IsNotEmpty">
+    <TextEdit Placeholder="Enter name">
+        <Feedback>
+            <ValidationNone>Please enter the name.</ValidationNone>
+            <ValidationSuccess>Name is good.</ValidationSuccess>
+            <ValidationError>Enter valid name!</ValidationError>
+        </Feedback>
+    </TextEdit>
+</Validation>
+
+<Validation Validator="ValidateEmail">
+    <TextEdit Placeholder="Enter email">
+        <Feedback>
+            <ValidationNone>Please enter the email.</ValidationNone>
+            <ValidationSuccess>Email is good.</ValidationSuccess>
+            <ValidationError>Enter valid email!</ValidationError>
+        </Feedback>
+    </TextEdit>
+</Validation>
+@code{
+    void ValidateEmail( ValidatorEventArgs e )
+    {
+        var email = Convert.ToString( e.Value );
+
+        e.Status = string.IsNullOrEmpty( email ) ? ValidationStatus.None :
+            email.Contains( "@" ) ? ValidationStatus.Success : ValidationStatus.Error;
+    }
+}
+```
+
+> Check the [Blazorise documentation](https://blazorise.com/docs/components/validation) for more information and examples.