Consistent use of extension methods in class

Author: drewnoakes

src/Microsoft.VisualStudio.ProjectSystem.Managed/ProjectSystem/PackageRestore/Snapshots/RestoreHasher.cs

@@ -28,7 +28,7 @@ public static Hash CalculateHash(ProjectRestoreInfo restoreInfo)
             hasher.AppendReferences(framework.NuGetAuditSuppress);
         }
 
-        AppendReferences(hasher, restoreInfo.ToolReferences);
+        hasher.AppendReferences(restoreInfo.ToolReferences);
 
         return hasher.GetHashAndReset();
     }
@@ -37,24 +37,24 @@ private static void AppendFrameworkProperties(this IncrementalHasher hasher, Tar
     {
         foreach ((string key, string value) in framework.Properties)
         {
-            AppendProperty(hasher, key, value);
+            hasher.AppendProperty(key, value);
         }
     }
 
     private static void AppendReferences(this IncrementalHasher hasher, ImmutableArray<ReferenceItem> references)
     {
         foreach (ReferenceItem reference in references)
         {
-            AppendProperty(hasher, nameof(reference.Name), reference.Name);
-            AppendReferenceProperties(hasher, reference);
+            hasher.AppendProperty(nameof(reference.Name), reference.Name);
+            hasher.AppendReferenceProperties(reference);
         }
     }
 
     private static void AppendReferenceProperties(this IncrementalHasher hasher, ReferenceItem reference)
     {
         foreach ((string key, string value) in reference.Properties)
         {
-            AppendProperty(hasher, key, value);
+            hasher.AppendProperty(key, value);
         }
     }