Adding testing for Process object deserializaion rule

Author: mbdavid

LiteDB.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.29609.76
+# Visual Studio Version 17
+VisualStudioVersion = 17.1.32328.378
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LiteDB", "LiteDB\LiteDB.csproj", "{9497DA19-1FCA-4C2E-A1AB-8DFAACBC76E1}"
 EndProject

LiteDB/Client/Mapper/BsonMapper.Deserialize.cs

@@ -170,7 +170,20 @@ public object Deserialize(Type type, BsonValue value)
                     var actualType = _typeNameBinder.GetType(typeField.AsString);
 
                     if (actualType == null) throw LiteException.InvalidTypedName(typeField.AsString);
-                    if (!type.IsAssignableFrom(actualType)) throw LiteException.DataTypeNotAssignable(type.FullName, actualType.FullName);
+
+                    // avoid initialize class that are not assignable 
+                    if (!type.IsAssignableFrom(actualType))
+                    {
+                        throw LiteException.DataTypeNotAssignable(type.FullName, actualType.FullName);
+                    }
+
+                    // avoid use of "System.Diagnostics.Process" in object type definition
+                    // using String test to work in .netstandard 1.3
+                    if (actualType.FullName.Equals("System.Diagnostics.Process", StringComparison.OrdinalIgnoreCase) &&
+                        actualType.Assembly.GetName().Name.Equals("System", StringComparison.OrdinalIgnoreCase))
+                    {
+                        throw LiteException.AvoidUseOfProcess();
+                    }
 
                     type = actualType;
                 }

LiteDB/LiteDB.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net45;netstandard1.3;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net4.5;netstandard1.3;netstandard2.0</TargetFrameworks>
     <AssemblyVersion>5.0.12</AssemblyVersion>
     <FileVersion>5.0.12</FileVersion>
     <VersionPrefix>5.0.12</VersionPrefix>

LiteDB/Utils/LiteException.cs

@@ -52,6 +52,7 @@ public class LiteException : Exception
         public const int INVALID_NULL_CHAR_STRING = 212;
         public const int INVALID_FREE_SPACE_PAGE = 213;
         public const int DATA_TYPE_NOT_ASSIGNABLE = 214;
+        public const int AVOID_USE_OF_PROCESS = 215;
 
         #endregion
 
@@ -312,6 +313,11 @@ internal static LiteException DataTypeNotAssignable(string type1, string type2)
             return new LiteException(DATA_TYPE_NOT_ASSIGNABLE, $"Data type {type1} is not assignable from data type {type2}");
         }
 
+        internal static LiteException AvoidUseOfProcess()
+        {
+            return new LiteException(AVOID_USE_OF_PROCESS, $"LiteDB do not accept System.Diagnostics.Process class in deserialize mapper");
+        }
+
         #endregion
     }
 }