Add mutex lock to PropertyDictionary

It was pointed out that since the PropertyDictionary is caching the
properties of types using a static dictionary, it must be made thread
safe.

mustache-sharp.test/Properties/AssemblyInfo.cs

@@ -1,10 +1,6 @@
 using System.Reflection;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
-// General Information about an assembly is controlled through the following 
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
 [assembly: AssemblyTitle("mustache-sharp.test")]
 [assembly: AssemblyDescription("")]
 [assembly: AssemblyConfiguration("")]
@@ -13,23 +9,7 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyCopyright("Copyright ©  2013")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
-
-// Setting ComVisible to false makes the types in this assembly not visible 
-// to COM components.  If you need to access a type in this assembly from 
-// COM, set the ComVisible attribute to true on that type.
 [assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("9975f293-f972-4751-9c8c-e25b17c0c8bc")]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version 
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers 
-// by using the '*' as shown below:
 [assembly: AssemblyVersion("0.0.0.0")]
 [assembly: AssemblyFileVersion("0.0.0.0")]

mustache-sharp/Properties/AssemblyInfo.cs

@@ -1,11 +1,8 @@
 using System;
 using System.Reflection;
-using System.Runtime.InteropServices;
 using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 
-// General Information about an assembly is controlled through the following 
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
 [assembly: AssemblyTitle("mustache-sharp")]
 [assembly: AssemblyDescription("A extension of the mustache text template engine for .NET.")]
 [assembly: AssemblyConfiguration("")]
@@ -15,25 +12,8 @@ using System.Runtime.CompilerServices;
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 [assembly: CLSCompliant(true)]
-
-// Setting ComVisible to false makes the types in this assembly not visible 
-// to COM components.  If you need to access a type in this assembly from 
-// COM, set the ComVisible attribute to true on that type.
 [assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("e5a4263d-d450-4d85-a4d5-44c0a2822668")]
-
+[assembly: AssemblyVersion("0.2.5.0")]
-// Version information for an assembly consists of the following four values:
+[assembly: AssemblyFileVersion("0.2.5.0")]
-//
-//      Major Version
-//      Minor Version 
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers 
-// by using the '*' as shown below:
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.2.4.0")]
-[assembly: AssemblyFileVersion("0.2.4.0")]
 [assembly: InternalsVisibleTo("mustache-sharp.test")]

mustache-sharp/PropertyDictionary.cs

@@ -29,10 +29,13 @@ namespace Mustache
                 _typeCache = new Dictionary<string, Func<object, object>>();
             }
             else
+            {
+                lock (_cache)
                 {
                     _typeCache = getCacheType(_instance);
                 }
             }
+        }
 
         private static Dictionary<string, Func<object, object>> getCacheType(object instance)
         {