Value to be dynamic

Question

Hi

  In below code i want to pass value dynamic instead of hard coded value - 321483788811

var body = @"{" + "\n" +
            @"    ""awbs"": [" + "\n" +
            @"        ""321483788811""," + "\n" +
            @"        ""NMBC0001789312""" + "\n" +
            @"    ]" + "\n" +
            @"}";

Thanks