A class used to construct REST requests.

RequestBuilder.cs

using System;
using RestSharp;

namespace Application.Services
{
    public class RequestBuilder
    {
        private IRestRequest request;

        #region Static Constructors

        public static RequestBuilder GET(string resourceUri)
        {
            return Init(resourceUri, Method.GET);
        }

        public static RequestBuilder POST(string resourceUri)
        {
            return Init(resourceUri, Method.POST);
        }

        public static RequestBuilder PUT(string resourceUri)
        {
            return Init(resourceUri, Method.PUT);
        }

        public static RequestBuilder DELETE(string resourceUri)
        {
            return Init(resourceUri, Method.DELETE);
        }

        #endregion

        public RequestBuilder WithBody(string body)
        {
            if (this.request.Method == Method.POST || this.request.Method == Method.PUT || this.request.Method == Method.DELETE)
            {
                this.request.AddJsonBody(body);
            }

            return this;
        }

        public RequestBuilder WithBody(object body)
        {
            this.request.AddJsonBody(body);

            return this;
        }

        public RequestBuilder WithFile(string key, byte[] data, string name)
        {
            this.request.AddFile(key, data, name);

            return this;
        }

        public RequestBuilder WithHeader(string key, string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                this.request.AddHeader(key, value);
            }

            return this;
        }

        public RequestBuilder WithParameter(string key, string value)
        {
            this.request.AddParameter(key, value);

            return this;
        }

        public RequestBuilder WithParameter(string key, dynamic value)
        {
            string s = value.ToString();
            this.request.AddParameter(key, s);

            return this;
        }

        public RequestBuilder WithQueryStringParameter(string key, string value)
        {
            this.request.AddQueryParameter(key, value);

            return this;
        }

        public RequestBuilder WithUrlSegment(string key, string value)
        {
            this.request.AddUrlSegment(key, value);

            return this;
        }

        public RequestBuilder WithUrlSegment(string key, dynamic value)
        {
            string s = value.ToString();
            this.request.AddUrlSegment(key, s);

            return this;
        }

        public IRestRequest Build()
        {
            return this.request;
        }

        private static RequestBuilder Init(string resourceUri, Method method)
        {
            var resource = resourceUri.StartsWith("/", StringComparison.CurrentCultureIgnoreCase) ? resourceUri.Substring(1) : resourceUri;
            var builder = new RequestBuilder { request = new RestRequest($"api/{resource}", method) };
            builder.request.AddHeader(C.Headers.Accept, C.Headers.Json);

            return builder;
        }
    }
}