System.Data.SQLite

I tried to convert to Int32 property to string property, using EF6

Public class Class1 {public string PropertyString {get; Set; }}

  Var q1 = from a in ctx.Table
            Select new Class1
            {
                PropertyString = a.PropertyInt + ""
            });

Thanks

System.NotSupportedException: Unable to cast the type 'System.Int32' to type 'System.Object'. LINQ to Entities only supports casting EDM primitive or enumeration types

Any idea or workaround?

Try using the ToString method on the Int32 property?  In your example:

Public class Class1 {public string PropertyString {get; Set; }}

  Var q1 = from a in ctx.Table
            Select new Class1
            {
                PropertyString = a.PropertyInt.ToString() + ""
            });

I tried, I changed and throw error

System.NotSupportedException: LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method cannot be translated into a store expression

In that case, I'm not sure how to accomplish what you are seeking.  I do not have
a lot of experience using LINQ.