/// <summary>
/// Checks to see if the object has a specific attribute.
/// </summary>
/// <param name="this">The object to check.</param>
/// <param name="attributeType">The type of the custom attribute.</param>
/// <param name="inherit">When <c>true</c>, look up the hierarchy chain for the inherited custom attribute.</param>
/// <returns>Returns <c>true</c> if the object has the attribute, otherwise <c>false</c>.</returns>
/// <exception cref="ArgumentNullException">
/// Thrown if <paramref name="this"/> is <c>null</c>.
/// </exception>
public static bool HasAttribute(this object self, Type attributeType, bool inherit)
{
if (self is null)
{
throw new ArgumentNullException(nameof(self));
}
return(ICustomAttributeProviderExtensions.HasAttribute(
self.GetType().GetTypeInfo(), attributeType, inherit));
}
public void GetCustomAttributesFailsWithNullThis()
{
Assert.Throws <ArgumentNullException>(() =>
ICustomAttributeProviderExtensions.GetCustomAttributes <object>(null, true));
}
/// <summary>
/// Checks to see if the object has a specific attribute.
/// </summary>
/// <param name="this">The object to check.</param>
/// <param name="attributeType">The type of the custom attribute.</param>
/// <param name="inherit">When <c>true</c>, look up the hierarchy chain for the inherited custom attribute.</param>
/// <returns>Returns <c>true</c> if the object has the attribute, otherwise <c>false</c>.</returns>
/// <exception cref="ArgumentNullException">
/// Thrown if <paramref name="this"/> is <c>null</c>.
/// </exception>
public static bool HasAttribute(this object @this, Type attributeType, bool inherit)
{
@this.CheckParameterForNull("@this");
return(ICustomAttributeProviderExtensions.HasAttribute(
@this.GetType(), attributeType, inherit));
}
