Add LanguageVersion, RemoveDeadCode and RemoveDeadStores options to powershell cmdlet.

ICSharpCode.Decompiler.PowerShell/GetDecompilerCmdlet.cs

@@ -15,13 +15,24 @@ namespace ICSharpCode.Decompiler.PowerShell
 		[ValidateNotNullOrEmpty]
 		public string LiteralPath { get; set; }
 
+		[Parameter(HelpMessage = "C# Language version to be used by the decompiler")]
+		public LanguageVersion LanguageVersion { get; set; } = LanguageVersion.Latest;
+
+		[Parameter(HelpMessage = "Remove dead stores")]
+		public bool RemoveDeadStores { get; set; }
+
+		[Parameter(HelpMessage = "Remove dead code")]
+		public bool RemoveDeadCode { get; set; }
+
 		protected override void ProcessRecord()
 		{
 			string path = GetUnresolvedProviderPathFromPSPath(LiteralPath);
 
 			try {
-				var decompiler = new CSharpDecompiler(path, new DecompilerSettings() {
-					ThrowOnAssemblyResolveErrors = false
+				var decompiler = new CSharpDecompiler(path, new DecompilerSettings(LanguageVersion) {
+					ThrowOnAssemblyResolveErrors = false,
+					RemoveDeadCode = RemoveDeadCode,
+					RemoveDeadStores = RemoveDeadStores
 				});
 				WriteObject(decompiler);