get-version -v should be case-insensitive

Author: asherber

src/nbgv/Program.cs

@@ -5,6 +5,7 @@ namespace Nerdbank.GitVersioning.Tool
     using System.CommandLine;
     using System.IO;
     using System.Linq;
+    using System.Reflection;
     using System.Threading;
     using System.Threading.Tasks;
     using Newtonsoft.Json;
@@ -25,6 +26,8 @@ internal class Program
 
         private const string DefaultRef = "HEAD";
 
+        private const BindingFlags CaseInsensitiveFlags = BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.IgnoreCase;
+
         private enum ExitCodes
         {
             OK,
@@ -316,7 +319,7 @@ private static ExitCodes OnGetVersionCommand(string projectPath, string format,
                     return ExitCodes.UnsupportedFormat;
                 }
 
-                var property = oracle.GetType().GetProperty(singleVariable);
+                var property = oracle.GetType().GetProperty(singleVariable, CaseInsensitiveFlags);
                 if (property == null)
                 {
                     Console.Error.WriteLine("Variable \"{0}\" not a version property.", singleVariable);