StringBuilder buffer = new StringBuilder( "Hello, how are you?" );
string output = "buffer = " + buffer.ToString() + "\nLength = " + buffer.Length + "\nCapacity = " + buffer.Capacity;
buffer.Length = 10;
output += "\n\nNew length = " +  buffer.Length + "\nbuffer = ";
// use StringBuilder indexer
for ( int i = 0; i < buffer.Length; i++ )
output += buffer[ i ];
Console.WriteLine(output);
