Fix smart contracts project

Sources/Stratis.SmartContracts.Tools.Sct/Builder/Builder.cs

+using System.ComponentModel.DataAnnotations;
+using System.IO;
+using McMaster.Extensions.CommandLineUtils;
+
+namespace Stratis.SmartContracts.Tools.Sct.Build
+{
+    [Command(Description = "Builds a smart contract and outputs a dll. For testing purposes.")]
+    [HelpOption]
+    class Builder
+    {
+        [Argument(
+            0,
+            Description = "The file containing the source code of the smart contract to deploy",
+            Name = "<File>")]
+        [Required]
+        [FileExists]
+        public string InputFile { get; }
+
+        [Argument(
+            1,
+            Description = "The destination path",
+            Name = "<Path>")]
+        [Required]
+        public string OutputPath { get; }
+
+        [Option(
+            "-params|--params",
+            CommandOptionType.MultipleValue,
+            Description = "Params to be passed to the constructor when instantiating the contract")]
+        public string[] Params { get; }
+
+        public int OnExecute(CommandLineApplication app, IConsole console)
+        {
+            console.WriteLine();
+            console.WriteLine("Smart Contract Deployer");
+            console.WriteLine();
+
+            if (!File.Exists(this.InputFile))
+            {
+                console.WriteLine($"{this.InputFile} does not exist");
+                return 1;
+            }
+
+            if (File.Exists(this.OutputPath))
+            {
+                console.WriteLine($"Output file already exists!");
+                return 1;
+            }
+
+            console.WriteLine($"Reading {this.InputFile}...");
+
+            string source;
+            using (var sr = new StreamReader(File.OpenRead(this.InputFile)))
+            {
+                source = sr.ReadToEnd();
+            }
+
+            console.WriteLine($"Read {this.InputFile} OK!");
+            console.WriteLine();
+
+            if (string.IsNullOrWhiteSpace(source))
+            {
+                console.WriteLine($"Empty file at {this.InputFile}");
+                return 1;
+            }
+
+            ValidationServiceResult validationResult = new ValidatorService().Validate(this.InputFile, source, console, this.Params);
+            if (!validationResult.Success)
+                return 1;
+            else
+                console.WriteLine("Validation passed!");
+
+            this.WriteDll(validationResult.CompilationResult.Compilation);
+            console.WriteLine($"File {this.OutputPath} written.");
+
+            return 1;
+        }
+
+        private void WriteDll(byte[] compilation)
+        {
+            using (FileStream sw = File.OpenWrite(this.OutputPath))
+            {
+                sw.Write(compilation, 0, compilation.Length);
+            }
+        }
+    }
+}
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