c# How to set a fixed char array = System.String

Here is my issue. I have a struct similar to the one below that has a fixed char array. The 'fixed char'  is necessary because the structure will be in shared memory (requirement). I want to do something like what is shown below:

public struct AStruct
{
      public long  tnum;
      public fixed char   tname[64];
}

AStruct mystruct = new AStruct();

String newstr = "Something";

mystruct.tname = newstr; //this is the line I need help with

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Thanks, Brian
BrianDumasAsked:
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it_saigeDeveloperCommented:
Here is one method:
using System;

namespace EE_Q29074918
{
    class Program
    {
        static void Main(string[] args)
        {
            AStruct myStruct = new AStruct();
            String newString = "Something";
            unsafe
            {
                SetName(newString, myStruct.tname);
                for (int i = 0; myStruct.tname[i] != '\0'; ++i)
                {
                    Console.Write(myStruct.tname[i]);
                }
            }
            Console.ReadLine();
        }

        unsafe static void SetName(string name, char* buffer)
        {
            fixed (char* chars = name)
            {
                for (int i = 0; chars[i] != '\0'; ++i)
                {
                    buffer[i] = chars[i];
                }
            }
        }
    }

    unsafe struct AStruct
    {
        public long tnum;
        public fixed char tname[64]; 
    }
}

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Which produces the following output -Capture.PNG
-saige-
0

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