What’s likely happening is that SignalData is indirectly changing the subscribers dictionary under the hood during the loop and leading to that message. You can verify this by changing foreach(Subscriber s in subscribers.Values) To foreach(Subscriber s in subscribers.Values.ToList()) If I’m right, the problem will disappear. Calling subscribers.Values.ToList() copies the values of subscribers.Values to a separate … Read more
public static object GetPropValue(object src, string propName) { return src.GetType().GetProperty(propName).GetValue(src, null); } Of course, you will want to add validation and whatnot, but that is the gist of it.
You can’t query against the DataTable‘s Rows collection, since DataRowCollection doesn’t implement IEnumerable<T>. You need to use the AsEnumerable() extension for DataTable. Like so: var results = from myRow in myDataTable.AsEnumerable() where myRow.Field<int>(“RowNo”) == 1 select myRow; And as @Keith says, you’ll need to add a reference to System.Data.DataSetExtensions AsEnumerable() returns IEnumerable<DataRow>. If you need … Read more
Unless that value is 0 (in which case you can omit some part of the initializer and the corresponding elements will be initialized to 0), there’s no easy way. Don’t overlook the obvious solution, though: int myArray[10] = { 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 }; Elements with missing values will … Read more
For you to output foo {1, 2, 3} you have to do something like: string t = “1, 2, 3″; string v = String.Format(” foo {{{0}}}”, t); To output a { you use {{ and to output a } you use }}. Or now, you can also use C# string interpolation like this (a feature … Read more
Use an anonymous type. Eg group x by new { x.Column1, x.Column2 }
If you are happy to have a dependency upon the System.Web.Helpers assembly, then you can use the Json class: dynamic data = Json.Decode(json); It is included with the MVC framework as an additional download to the .NET 4 framework. Be sure to give Vlad an upvote if that’s helpful! However if you cannot assume the … Read more
How can it be? Isn’t the memory of a local variable inaccessible outside its function? You rent a hotel room. You put a book in the top drawer of the bedside table and go to sleep. You check out the next morning, but “forget” to give back your key. You steal the key! A week … Read more
They are equivalent, from the standard (emphasis mine) (7.1.3.2): A typedef-name can also be introduced by an alias-declaration. The identifier following the using keyword becomes a typedef-name and the optional attribute-specifier-seq following the identifier appertains to that typedef-name. It has the same semantics as if it were introduced by the typedef specifier. In particular, it … Read more
In .NET Core and .NET Framework ≥4.0 there is a generic parse method: Enum.TryParse(“Active”, out StatusEnum myStatus); This also includes C#7’s new inline out variables, so this does the try-parse, conversion to the explicit enum type and initialises+populates the myStatus variable. If you have access to C#7 and the latest .NET this is the best … Read more