Value to be dynamic

Simply use the $"string" with placeholders option as below:

var value1 = "Test";
var val = $"This is a test value = {value1}";

Console.WriteLine(val);

Using C#11

Hi Ramco,

You can use string interploation as $ and do as below to pass dynamic parameter,

            var param = "321483788811";
            var param1 = "NMBC0001789312";

            var body = $@"{{ ""awbs"": [ ""{ param} "",""{ param1 }""]}}";

Try Following

string val1 = "321483788811";
string val2 = "NMBC0001789312";

var body = $@"{{
                ""awbs"": [
                    ""{val1}"",
                    ""{val2}""
                ]
            }}";

Or Create function for body like following

private static string GetBodyString(string val1, string val2)
{
   var body = $@"{{
                ""awbs"": [
                    ""{val1}"",
                    ""{val2}""
                ]
            }}";

   return body;
}


//Call that function. Here, I have called that function two times to show you how you can set the dynamic value in the body.

string body = GetBodyString("321483788811", "NMBC0001789312");

string body1 = GetBodyString("521583788811", "NKXC0001789312");

Try this

private static string GetBody(string valueOne, string valueTwo)
{
    var body = @"{" + "\n" +
    @"    ""awbs"": [" + "\n" +
    @"        ""{val1}""," + "\n" +
    @"        ""{val2}""" + "\n" +
    @"    ]" + "\n" +
    @"}";

    var postBody = new StringBuilder(body);
    postBody.Replace("{val1}", valueOne);
    postBody.Replace("{val2}", valueTwo);
    return postBody.ToString();
}

How to call

string body = GetBody("321483788811", "NMBC0001789312");