/// <summary>
/// Checks to see if the given provider has an attribute of a specific type.
/// </summary>
/// <param name="this">The <see cref="ICustomAttributeProvider"/> 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 provider has the attribute, otherwise <c>false</c>.</returns>
/// <exception cref="ArgumentNullException">
/// Thrown if either <paramref name="this"/> or <paramref name="attributeType"/> is <c>null</c>.
/// </exception>
public static bool HasAttribute(this ICustomAttributeProvider @this, Type attributeType, bool inherit)
{
@this.CheckParameterForNull("@this");
attributeType.CheckParameterForNull("attribute");
return((from attribute in @this.GetCustomAttributes(attributeType, inherit)
where attributeType.IsAssignableFrom(attribute.GetType())
select attribute).Count() > 0);
}
