diff --git a/ICD.Common.Utils.Tests/Extensions/EnumerableExtensionsTest.cs b/ICD.Common.Utils.Tests/Extensions/EnumerableExtensionsTest.cs
new file mode 100644
index 0000000..d2244e4
--- /dev/null
+++ b/ICD.Common.Utils.Tests/Extensions/EnumerableExtensionsTest.cs
@@ -0,0 +1,21 @@
+using ICD.Common.Utils.Extensions;
+using NUnit.Framework;
+using System.Linq;
+
+namespace ICD.Common.Utils.Tests_NetStandard.Extensions
+{
+	[TestFixture]
+    public sealed class EnumerableExtensionsTest
+    {
+		[Test]
+		public void ConsolidateTest()
+		{
+			string[] sequence = EnumerableExtensions.Consolidate(new string[] { "A", "B", "B", "C" }).ToArray();
+
+			Assert.AreEqual(3, sequence.Length, StringUtils.ArrayFormat(sequence));
+			Assert.AreEqual("A", sequence[0]);
+			Assert.AreEqual("B", sequence[1]);
+			Assert.AreEqual("C", sequence[2]);
+		}
+	}
+}
diff --git a/ICD.Common.Utils/Extensions/EnumerableExtensions.cs b/ICD.Common.Utils/Extensions/EnumerableExtensions.cs
index cdf343b..80e23df 100644
--- a/ICD.Common.Utils/Extensions/EnumerableExtensions.cs
+++ b/ICD.Common.Utils/Extensions/EnumerableExtensions.cs
@@ -644,7 +644,7 @@ namespace ICD.Common.Utils.Extensions
 		/// <param name="extends"></param>
 		/// <returns></returns>
 		[PublicAPI]
-		public static IEnumerable<T> Consolidate<T>(IEnumerable<T> extends)
+		public static IEnumerable<T> Consolidate<T>(this IEnumerable<T> extends)
 		{
 			if (extends == null)
 				throw new ArgumentNullException("extends");
@@ -664,7 +664,7 @@ namespace ICD.Common.Utils.Extensions
 		/// <param name="comparer"></param>
 		/// <returns></returns>
 		[PublicAPI]
-		public static IEnumerable<T> Consolidate<T>(IEnumerable<T> extends, IComparer<T> comparer)
+		public static IEnumerable<T> Consolidate<T>(this IEnumerable<T> extends, IComparer<T> comparer)
 		{
 			if (extends == null)
 				throw new ArgumentNullException("extends");
@@ -677,7 +677,7 @@ namespace ICD.Common.Utils.Extensions
 
 			foreach (T item in extends)
 			{
-				if (!first && comparer.Compare(last, item) != 0)
+				if (!first && comparer.Compare(last, item) == 0)
 					continue;
 
 				first = false;
diff --git a/ICD.Common.Utils/StringUtils.cs b/ICD.Common.Utils/StringUtils.cs
index 4a18951..8a27161 100644
--- a/ICD.Common.Utils/StringUtils.cs
+++ b/ICD.Common.Utils/StringUtils.cs
@@ -115,6 +115,16 @@ namespace ICD.Common.Utils
 			return string.Join("", strings);
 		}
 
+		/// <summary>
+		/// Uses String.Format to properly handle null values.
+		/// </summary>
+		/// <param name="value"></param>
+		/// <returns></returns>
+		public static string ToString(object value)
+		{
+			return string.Format("{0}", value);
+		}
+
 		/// <summary>
 		/// Converts bytes to an ascii string.
 		/// </summary>
@@ -360,7 +370,7 @@ namespace ICD.Common.Utils
 			if (items == null)
 				throw new ArgumentNullException("items");
 
-			return string.Format("[{0}]", string.Join(", ", items.Select(i => i.ToString()).ToArray()));
+			return string.Format("[{0}]", string.Join(", ", items.Select(i => ToString(i)).ToArray()));
 		}
 
 		/// <summary>
@@ -377,7 +387,7 @@ namespace ICD.Common.Utils
 
 			string[] ranges = MathUtils.GetRanges(items)
 			                           .Select(r => r[0] == r[1]
-				                                        ? r[0].ToString()
+				                                        ? ToString(r[0])
 				                                        : string.Format("{0}-{1}", r[0], r[1]))
 			                           .ToArray();