System.ArgumentException : No mapping exists from object type System.Collections.Generic.KeyValuePair`2[[System.String, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]] to a known managed provider native type.

   at System.Data.SqlClient.MetaType.GetMetaTypeFromValue(Type dataType, Object value, Boolean inferLen, Boolean streamAllowed)

   at System.Data.SqlClient.MetaType.GetMetaTypeFromType(Type dataType)

   at System.Data.SqlClient.SqlParameter.GetMetaTypeOnly()

   at System.Data.SqlClient.SqlParameter.Validate(Int32 index, Boolean isCommandProc)

   at System.Data.SqlClient.SqlCommand.BuildParamList(TdsParser parser, SqlParameterCollection parameters)

   at System.Data.SqlClient.SqlCommand.BuildExecuteSql(CommandBehavior behavior, String commandText, SqlParameterCollection parameters, _SqlRPC& rpc)

   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)

   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite, String method)

   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)

   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior)

   at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)

   at System.Data.Common.DbCommand.ExecuteReader()

   at RepoDb.DbConnectionExtension.ExecuteQueryInternal(IDbConnection connection, String commandText, Object param, Nullable`1 commandType, String cacheKey, Nullable`1 cacheItemExpiration, Nullable`1 commandTimeout, IDbTransaction transaction, ICache cache, String tableName, Boolean skipCommandArrayParametersCheck)

   at RepoDb.DbConnectionExtension.ExecuteQuery(IDbConnection connection, String commandText, Object param, Nullable`1 commandType, String cacheKey, Nullable`1 cacheItemExpiration, Nullable`1 commandTimeout, IDbTransaction transaction, ICache cache)

    public class JsonObjectTypeHandler : IPropertyHandler<string, Dictionary<string, string>>
    {
        public Dictionary<string, string> Get(string input, ClassProperty property)
        {
            return JsonConvert.DeserializeObject<Dictionary<string, string>>(input);
        }
 

        public string Set(Dictionary<string, string> input, ClassProperty property)
        {
            return JsonConvert.SerializeObject(input);
        }
    }

    public class Foo
    {
        public Guid Id { get; set; }

        [PropertyHandler(typeof(JsonObjectTypeHandler))] 
        public Dictionary<string, string> Bars { get; set; }
   }