GTPCorrgir/ClipboardHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GTPCorrgir
{
    public static class ClipboardHelper
    {
        private static readonly int MaxRetries = 5;
        private static readonly int RetryDelay = 100; // milliseconds

        public static async Task<bool> SetText(string text)
        {
            for (int i = 0; i < MaxRetries; i++)
            {
                try
                {
                    await Task.Delay(RetryDelay);
                    await System.Windows.Application.Current.Dispatcher.InvokeAsync(() =>
                    {
                        System.Windows.Clipboard.SetText(text);
                    });
                    return true;
                }
                catch (Exception)
                {
                    if (i == MaxRetries - 1) throw;
                }
            }
            return false;
        }

        public static async Task<string> GetText()
        {
            string text = null;
            for (int i = 0; i < MaxRetries; i++)
            {
                try
                {
                    await Task.Delay(RetryDelay);
                    text = await System.Windows.Application.Current.Dispatcher.InvokeAsync(() =>
                    {
                        return System.Windows.Clipboard.GetText();
                    });
                    return text;
                }
                catch (Exception)
                {
                    if (i == MaxRetries - 1) throw;
                }
            }
            return text;
        }
    }
}