Memory Efficiency and Performance of String.Replace .NET Framework

Question

 string str1 = \"12345ABC...\\\\...ABC100000\"; 
 // Hypothetically huge string of 100000 + Unicode Chars
 str1 = str1.Replace(\"1\", string.Empty);
 str1 = str1.Rep         


        

Answer 1

StringBuilder sb = new StringBuilder("Hello string");
sb.Replace("string", String.Empty);
Console.WriteLine(sb);  

StringBuilder, a mutable string.