Acceleratio.SPDG.Generator.SampleData.getMultipleLoremIpsum C# (CSharp) Method

        private static string getMultipleLoremIpsum(string lorem, int repeat)
        {
            StringBuilder sb = new StringBuilder();
            for(int i=0; i<repeat; i++)
            {
                if( i == 0 )
                {
                    sb.Append(lorem);
                }
                else
                {
                    var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
                    var random = new Random();
                    string modifiedLorem = lorem;

                    for (int a = 0; a < 100; a++ )
                    {
                        char ch1 = chars[random.Next(chars.Length)];
                        modifiedLorem = modifiedLorem.Insert(SampleData.GetRandomNumber(0, modifiedLorem.Length), Convert.ToString(ch1));
                    }

                    sb.Append(modifiedLorem);
                    sb.Append(Guid.NewGuid().ToString());

                }
            }

            return sb.ToString();
        }