Attribute Util : Attribute « XML « C# / C Sharp

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C# / C Sharp » XML » Attribute 

Attribute Util

using System;
using System.Collections.Generic;
using System.Reflection;
using System.Linq;

internal class AttributedTypesUtility
    internal static List<Type> GetTypesWithAttribute(Type attributeType)
        var typesWithAttribute = new List<Type>();
        Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();

        foreach (Assembly assembly in assemblies)
            IEnumerable<Type> typesWithAttributeInAssembly = GetTypesWithAttributeInAssembly(assembly, attributeType);

        return typesWithAttribute;

    private static IEnumerable<Type> GetTypesWithAttributeInAssembly(Assembly assembly, Type attributeType)
        Type[] types = assembly.GetTypes();
        return types.Where(type => TypeHasAttribute(type, attributeType)).ToList();

    private static bool TypeHasAttribute(Type type, Type attributeType)
        bool typeHasAttribute = false;
        object[] attributes = GetAttributes(type);

        foreach (object attribute in attributes)
            if (attributeType.IsAssignableFrom(attribute.GetType()))
                typeHasAttribute = true;

        return typeHasAttribute;

    private static object[] GetAttributes(Type type)
        return type.GetCustomAttributes(true); ;

    internal static Attribute GetAttribute(Type type, Type attributeType)
        Attribute attribute = null;

        object[] attributes = type.GetCustomAttributes(true);
        foreach (object attributeInType in attributes)
            if (attributeType.IsAssignableFrom(attributeInType.GetType()))
                attribute = (Attribute)attributeInType;

        return attribute;


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